/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:31:47,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:31:47,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:31:47,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 16:31:47,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 16:31:47,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 16:31:47,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 16:31:47,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 16:31:47,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 16:31:47,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 16:31:47,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 16:31:47,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 16:31:47,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 16:31:47,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 16:31:47,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 16:31:47,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 16:31:47,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 16:31:47,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 16:31:47,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 16:31:47,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 16:31:47,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 16:31:47,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 16:31:47,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 16:31:47,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 16:31:47,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 16:31:47,301 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 16:31:47,301 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 16:31:47,302 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 16:31:47,303 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 16:31:47,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 16:31:47,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 16:31:47,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 16:31:47,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 16:31:47,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 16:31:47,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 16:31:47,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 16:31:47,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 16:31:47,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 16:31:47,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:31:47,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:31:47,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:31:47,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:31:47,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:31:47,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:31:47,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:31:47,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:31:47,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:31:47,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:31:47,348 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:31:47,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:31:47,349 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:31:47,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:31:47,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:31:47,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:31:47,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:31:47,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:31:47,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:31:47,351 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:31:47,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:31:47,351 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:31:47,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:31:47,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:31:47,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:31:47,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:31:47,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:31:47,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:31:47,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:31:47,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:31:47,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:31:47,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:31:47,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:31:47,353 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:31:47,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:31:47,353 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:31:47,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:31:47,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:31:47,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:31:47,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:31:47,693 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:31:47,694 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:31:47,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl [2021-06-05 16:31:47,695 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl' [2021-06-05 16:31:47,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:31:47,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:31:47,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:31:47,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:31:47,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:31:47,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:31:47,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:31:47,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:31:47,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:31:47,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... [2021-06-05 16:31:47,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:31:47,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:31:47,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:31:47,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:31:47,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:31:47,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:31:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:31:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:31:47,860 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:31:47,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:31:47,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:31:47,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:31:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:31:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:31:47,861 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:31:47,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:31:47,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:31:47,862 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:31:48,012 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:31:48,012 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:31:48,013 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:31:48 BoogieIcfgContainer [2021-06-05 16:31:48,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:31:48,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:31:48,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:31:48,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:31:48,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:31:47" (1/2) ... [2021-06-05 16:31:48,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4c9c15 and model type max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:31:48, skipping insertion in model container [2021-06-05 16:31:48,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:31:48" (2/2) ... [2021-06-05 16:31:48,020 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun-alt.wvr.bpl [2021-06-05 16:31:48,025 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:31:48,025 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:31:48,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:31:48,026 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:31:48,057 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:31:48,076 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:31:48,112 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:31:48,112 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:31:48,112 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:31:48,112 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:31:48,112 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:31:48,112 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:31:48,112 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:31:48,113 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:31:48,120 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 16:31:48,139 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:31:48,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:48,149 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:48,149 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-06-05 16:31:48,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:48,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722807351] [2021-06-05 16:31:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:48,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:48,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722807351] [2021-06-05 16:31:48,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722807351] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:31:48,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:31:48,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:31:48,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817841435] [2021-06-05 16:31:48,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:31:48,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:48,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:31:48,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:31:48,318 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:48,351 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 16:31:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:31:48,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 16:31:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:48,363 INFO L225 Difference]: With dead ends: 217 [2021-06-05 16:31:48,363 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 16:31:48,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:31:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 16:31:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 16:31:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 16:31:48,409 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 16:31:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:48,410 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 16:31:48,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 16:31:48,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:31:48,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:48,412 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:48,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:31:48,412 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-05 16:31:48,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:48,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932804084] [2021-06-05 16:31:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:31:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932804084] [2021-06-05 16:31:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932804084] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:31:48,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:31:48,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:31:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568608824] [2021-06-05 16:31:48,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:31:48,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:31:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:31:48,491 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:48,542 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 16:31:48,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:31:48,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:31:48,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:48,545 INFO L225 Difference]: With dead ends: 158 [2021-06-05 16:31:48,545 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 16:31:48,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:31:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 16:31:48,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 16:31:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 16:31:48,561 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 16:31:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:48,562 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 16:31:48,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 16:31:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 16:31:48,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:48,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:48,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:31:48,564 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-06-05 16:31:48,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:48,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33851831] [2021-06-05 16:31:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:48,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:31:48,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:48,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33851831] [2021-06-05 16:31:48,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33851831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:31:48,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:31:48,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:31:48,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307834733] [2021-06-05 16:31:48,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:31:48,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:31:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:31:48,640 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:48,678 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 16:31:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:31:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 16:31:48,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:48,681 INFO L225 Difference]: With dead ends: 183 [2021-06-05 16:31:48,681 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 16:31:48,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:31:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 16:31:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 16:31:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 16:31:48,698 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 16:31:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:48,698 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 16:31:48,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 16:31:48,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:31:48,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:48,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:48,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:31:48,701 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-05 16:31:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:48,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898584494] [2021-06-05 16:31:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:49,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:49,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898584494] [2021-06-05 16:31:49,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898584494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:49,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447462057] [2021-06-05 16:31:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:31:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:49,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:31:49,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:49,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:31:49,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:49,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:31:49,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:49,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:49,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:31:49,610 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:15 [2021-06-05 16:31:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:49,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447462057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:49,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:49,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:31:49,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113954184] [2021-06-05 16:31:49,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:31:49,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:31:49,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:31:49,659 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:49,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:49,944 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 16:31:49,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:31:49,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:31:49,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:49,948 INFO L225 Difference]: With dead ends: 330 [2021-06-05 16:31:49,948 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 16:31:49,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:31:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 16:31:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 16:31:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 16:31:49,962 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 16:31:49,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:49,963 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 16:31:49,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 16:31:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:31:49,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:49,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:50,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:50,181 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-05 16:31:50,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:50,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844421858] [2021-06-05 16:31:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:50,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:50,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844421858] [2021-06-05 16:31:50,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844421858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:50,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407297444] [2021-06-05 16:31:50,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:50,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:50,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:31:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:50,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:50,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 16:31:50,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:50,884 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:50,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 16:31:50,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:50,899 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:50,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 16:31:50,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:50,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:50,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:31:50,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:50,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:50,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:31:50,989 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:114 [2021-06-05 16:31:51,114 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-05 16:31:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:51,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407297444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:51,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:51,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 16:31:51,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199589002] [2021-06-05 16:31:51,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:31:51,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:51,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:31:51,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:31:51,171 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:51,889 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-06-05 16:31:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:31:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:31:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:51,892 INFO L225 Difference]: With dead ends: 406 [2021-06-05 16:31:51,893 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 16:31:51,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:31:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 16:31:51,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-06-05 16:31:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 16:31:51,904 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 16:31:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:51,904 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 16:31:51,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 16:31:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:31:51,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:51,906 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:52,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:52,128 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:52,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-05 16:31:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:52,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476140612] [2021-06-05 16:31:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:52,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:52,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476140612] [2021-06-05 16:31:52,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476140612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:52,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835057135] [2021-06-05 16:31:52,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:52,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:31:52,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 16:31:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:52,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:31:52,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:52,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:31:52,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:52,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:31:52,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:52,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:52,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:31:52,446 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:67, output treesize:15 [2021-06-05 16:31:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:52,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835057135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:52,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:52,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:31:52,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995860924] [2021-06-05 16:31:52,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:31:52,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:52,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:31:52,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:31:52,504 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:52,697 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 16:31:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:31:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:31:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:52,700 INFO L225 Difference]: With dead ends: 363 [2021-06-05 16:31:52,700 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 16:31:52,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:31:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 16:31:52,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 16:31:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 16:31:52,711 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 16:31:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:52,712 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 16:31:52,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 16:31:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 16:31:52,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:52,713 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:52,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:52,929 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-05 16:31:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520316917] [2021-06-05 16:31:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:53,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520316917] [2021-06-05 16:31:53,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520316917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:53,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363291689] [2021-06-05 16:31:53,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:53,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:31:53,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:53,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 16:31:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:53,366 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 16:31:53,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:53,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:31:53,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:53,442 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:31:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 16:31:53,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:53,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 16:31:53,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:31:53,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:31:53,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:31:53,515 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-06-05 16:31:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:53,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363291689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:53,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:53,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:31:53,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067905681] [2021-06-05 16:31:53,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:31:53,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:53,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:31:53,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:31:53,619 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:53,969 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 16:31:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:31:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 16:31:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:53,973 INFO L225 Difference]: With dead ends: 425 [2021-06-05 16:31:53,973 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 16:31:53,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 421.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:31:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 16:31:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 16:31:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 16:31:53,983 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 16:31:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:53,985 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 16:31:53,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 16:31:53,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:53,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:53,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:54,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:54,201 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-05 16:31:54,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:54,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777076627] [2021-06-05 16:31:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:54,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:54,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777076627] [2021-06-05 16:31:54,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777076627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:54,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392573481] [2021-06-05 16:31:54,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:54,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:31:54,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:54,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:31:54,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:54,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392573481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:54,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:54,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:31:54,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368229106] [2021-06-05 16:31:54,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:31:54,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:54,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:31:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:31:54,384 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:54,757 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 16:31:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:31:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:54,761 INFO L225 Difference]: With dead ends: 619 [2021-06-05 16:31:54,761 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 16:31:54,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:31:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 16:31:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 16:31:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 16:31:54,771 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 16:31:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:54,772 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 16:31:54,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 16:31:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:54,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:54,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:54,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:54,989 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:54,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-05 16:31:54,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:54,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271603086] [2021-06-05 16:31:54,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:55,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271603086] [2021-06-05 16:31:55,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271603086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:55,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820706705] [2021-06-05 16:31:55,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:55,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:31:55,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:55,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:31:55,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:55,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:55,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820706705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:55,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:55,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:31:55,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265588707] [2021-06-05 16:31:55,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:31:55,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:55,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:31:55,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:31:55,171 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:55,918 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 16:31:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:31:55,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:55,924 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 16:31:55,924 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 16:31:55,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:31:55,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 16:31:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 16:31:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 16:31:55,939 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 16:31:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:55,939 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 16:31:55,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 16:31:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:55,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:55,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:56,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:56,161 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:56,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-05 16:31:56,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:56,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549886243] [2021-06-05 16:31:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:56,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549886243] [2021-06-05 16:31:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549886243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500119362] [2021-06-05 16:31:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:56,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:31:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:56,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500119362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:56,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:56,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:31:56,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034695432] [2021-06-05 16:31:56,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:31:56,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:56,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:31:56,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:31:56,342 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:56,992 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 16:31:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:31:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:56,997 INFO L225 Difference]: With dead ends: 951 [2021-06-05 16:31:56,997 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 16:31:56,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:31:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 16:31:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 16:31:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:57,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 16:31:57,011 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 16:31:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:57,011 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 16:31:57,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 16:31:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:57,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:57,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:57,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:57,225 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-05 16:31:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894754420] [2021-06-05 16:31:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:31:57,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894754420] [2021-06-05 16:31:57,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894754420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:57,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085857316] [2021-06-05 16:31:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:31:57,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:31:57,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085857316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:57,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:57,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:31:57,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150603921] [2021-06-05 16:31:57,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:31:57,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:31:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:31:57,341 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:57,443 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 16:31:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:31:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:57,447 INFO L225 Difference]: With dead ends: 669 [2021-06-05 16:31:57,447 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 16:31:57,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:31:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 16:31:57,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 16:31:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 16:31:57,458 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 16:31:57,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:57,459 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 16:31:57,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:57,459 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 16:31:57,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:57,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:57,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:57,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 16:31:57,673 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-05 16:31:57,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:57,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311717024] [2021-06-05 16:31:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:57,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:57,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311717024] [2021-06-05 16:31:57,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311717024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:57,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569776149] [2021-06-05 16:31:57,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:57,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:57,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:31:57,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:57,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569776149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:57,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:57,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:31:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429565990] [2021-06-05 16:31:57,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:31:57,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:57,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:31:57,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:31:57,844 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:58,018 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 16:31:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:31:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:58,022 INFO L225 Difference]: With dead ends: 710 [2021-06-05 16:31:58,022 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 16:31:58,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:31:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 16:31:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 16:31:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 16:31:58,045 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 16:31:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:58,045 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 16:31:58,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:58,046 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 16:31:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:58,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:58,047 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:58,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:58,261 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:58,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:58,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-05 16:31:58,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:58,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015827542] [2021-06-05 16:31:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:31:58,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015827542] [2021-06-05 16:31:58,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015827542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:58,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804959543] [2021-06-05 16:31:58,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:58,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:31:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:31:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:31:58,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804959543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:58,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:58,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:31:58,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48995903] [2021-06-05 16:31:58,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:31:58,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:58,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:31:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:31:58,401 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:58,521 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 16:31:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:31:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:58,533 INFO L225 Difference]: With dead ends: 830 [2021-06-05 16:31:58,533 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 16:31:58,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:31:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 16:31:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 16:31:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 16:31:58,550 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 16:31:58,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:58,551 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 16:31:58,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:58,551 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 16:31:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:58,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:58,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:58,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:58,776 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-05 16:31:58,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:58,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452214071] [2021-06-05 16:31:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:58,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:58,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452214071] [2021-06-05 16:31:58,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452214071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:58,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054498370] [2021-06-05 16:31:58,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:58,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:31:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:31:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:58,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054498370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:58,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:58,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:31:58,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055912337] [2021-06-05 16:31:58,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:31:58,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:31:58,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:31:58,963 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:31:59,247 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 16:31:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:31:59,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:31:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:31:59,252 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 16:31:59,252 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 16:31:59,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:31:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 16:31:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 16:31:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 16:31:59,271 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 16:31:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:31:59,271 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 16:31:59,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:31:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 16:31:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:31:59,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:31:59,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:31:59,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 16:31:59,495 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:31:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:31:59,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-05 16:31:59,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:31:59,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269906621] [2021-06-05 16:31:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:31:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:31:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:59,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:31:59,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269906621] [2021-06-05 16:31:59,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269906621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:59,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987914791] [2021-06-05 16:31:59,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:31:59,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:31:59,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:31:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:31:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:31:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:31:59,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987914791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:31:59,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:31:59,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:31:59,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539567251] [2021-06-05 16:31:59,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:31:59,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:31:59,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:31:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:31:59,665 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:00,073 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 16:32:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:32:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:00,080 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 16:32:00,080 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 16:32:00,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:32:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 16:32:00,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 16:32:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 16:32:00,125 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 16:32:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:00,125 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 16:32:00,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 16:32:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:00,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:00,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:00,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:32:00,345 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:00,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:00,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-05 16:32:00,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:00,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172570247] [2021-06-05 16:32:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:00,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172570247] [2021-06-05 16:32:00,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172570247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:00,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570778401] [2021-06-05 16:32:00,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:00,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:00,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:00,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570778401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:00,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:00,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:32:00,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734244892] [2021-06-05 16:32:00,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:00,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:00,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:00,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:00,533 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:00,789 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 16:32:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:32:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:00,795 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 16:32:00,795 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 16:32:00,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:32:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 16:32:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 16:32:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 16:32:00,825 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 16:32:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:00,825 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 16:32:00,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 16:32:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:00,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:00,827 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:01,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:32:01,043 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-05 16:32:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:01,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600057121] [2021-06-05 16:32:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:01,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600057121] [2021-06-05 16:32:01,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600057121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150642254] [2021-06-05 16:32:01,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:01,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:01,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:01,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150642254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:01,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:01,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:32:01,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298617895] [2021-06-05 16:32:01,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:01,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:01,220 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:01,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:01,495 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 16:32:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:32:01,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:01,501 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 16:32:01,501 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 16:32:01,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:32:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 16:32:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 16:32:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 16:32:01,525 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 16:32:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:01,526 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 16:32:01,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 16:32:01,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:01,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:01,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:01,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:01,749 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-05 16:32:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:01,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82952667] [2021-06-05 16:32:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:01,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:01,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82952667] [2021-06-05 16:32:01,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82952667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:01,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216812909] [2021-06-05 16:32:01,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:01,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:01,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216812909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:01,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:01,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:01,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240534989] [2021-06-05 16:32:01,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:01,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:01,867 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:02,197 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 16:32:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:32:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:02,202 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 16:32:02,202 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 16:32:02,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:32:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 16:32:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 16:32:02,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 16:32:02,224 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 16:32:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:02,224 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 16:32:02,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 16:32:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:02,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:02,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:02,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:02,441 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-05 16:32:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:02,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018871616] [2021-06-05 16:32:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:02,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018871616] [2021-06-05 16:32:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018871616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888007593] [2021-06-05 16:32:02,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:02,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:02,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:02,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:02,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:02,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888007593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:02,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:02,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:02,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741654086] [2021-06-05 16:32:02,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:02,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:02,595 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:03,301 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 16:32:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:32:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:03,311 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 16:32:03,311 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 16:32:03,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:32:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 16:32:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 16:32:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 16:32:03,343 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 16:32:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:03,343 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 16:32:03,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 16:32:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:03,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:03,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:03,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:03,568 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-05 16:32:03,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:03,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336954312] [2021-06-05 16:32:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:03,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:03,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336954312] [2021-06-05 16:32:03,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336954312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:03,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472545058] [2021-06-05 16:32:03,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:03,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:03,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472545058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:03,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:03,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:03,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877727997] [2021-06-05 16:32:03,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:03,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:03,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:03,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:03,747 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:04,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:04,409 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 16:32:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:32:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:04,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:04,416 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 16:32:04,416 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 16:32:04,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:32:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 16:32:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 16:32:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 16:32:04,443 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 16:32:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:04,443 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 16:32:04,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 16:32:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:04,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:04,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:04,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:04,661 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-05 16:32:04,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:04,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209688271] [2021-06-05 16:32:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:04,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:04,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209688271] [2021-06-05 16:32:04,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209688271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:04,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12174497] [2021-06-05 16:32:04,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:04,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:04,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:04,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12174497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:04,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:04,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303072736] [2021-06-05 16:32:04,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:04,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:04,812 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:05,417 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 16:32:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:32:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:05,423 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 16:32:05,423 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 16:32:05,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:32:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 16:32:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 16:32:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 16:32:05,455 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 16:32:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:05,456 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 16:32:05,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 16:32:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:05,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:05,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:05,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:32:05,681 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-05 16:32:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:05,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263109818] [2021-06-05 16:32:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:05,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:05,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263109818] [2021-06-05 16:32:05,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263109818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:05,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982950690] [2021-06-05 16:32:05,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:05,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:32:05,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:05,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:05,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982950690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:05,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:05,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458074040] [2021-06-05 16:32:05,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:05,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:05,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:05,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:05,819 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:06,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:06,332 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 16:32:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:32:06,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:06,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:06,337 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 16:32:06,337 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:32:06,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 302.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:32:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:32:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 16:32:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 16:32:06,368 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 16:32:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:06,368 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 16:32:06,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:06,368 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 16:32:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:06,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:06,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:06,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:06,585 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-05 16:32:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:06,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891632411] [2021-06-05 16:32:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:06,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:06,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891632411] [2021-06-05 16:32:06,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891632411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:06,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107736481] [2021-06-05 16:32:06,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:06,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:32:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107736481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:06,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:06,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221501726] [2021-06-05 16:32:06,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:06,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:06,761 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:07,370 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 16:32:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:32:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:07,376 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 16:32:07,376 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 16:32:07,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:32:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 16:32:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 16:32:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 16:32:07,408 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 16:32:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:07,408 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 16:32:07,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 16:32:07,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:07,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:07,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:07,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 16:32:07,634 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:07,634 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-05 16:32:07,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521390207] [2021-06-05 16:32:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:07,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:07,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521390207] [2021-06-05 16:32:07,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521390207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:07,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907771307] [2021-06-05 16:32:07,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:07,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:07,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907771307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:07,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:07,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:07,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188189457] [2021-06-05 16:32:07,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:07,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:07,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:07,770 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:08,338 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 16:32:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:32:08,338 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:08,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:08,343 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 16:32:08,343 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 16:32:08,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:32:08,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 16:32:08,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 16:32:08,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 16:32:08,371 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 16:32:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:08,372 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 16:32:08,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 16:32:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:08,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:08,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:08,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 16:32:08,589 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-05 16:32:08,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:08,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000323692] [2021-06-05 16:32:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:08,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:08,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000323692] [2021-06-05 16:32:08,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000323692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:08,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144139635] [2021-06-05 16:32:08,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:32:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:08,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:32:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:08,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144139635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:08,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:08,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:32:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539968951] [2021-06-05 16:32:08,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:32:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:32:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:32:08,694 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:08,774 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 16:32:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:32:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:08,777 INFO L225 Difference]: With dead ends: 929 [2021-06-05 16:32:08,777 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 16:32:08,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 16:32:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 16:32:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 16:32:08,798 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 16:32:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:08,798 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 16:32:08,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 16:32:08,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:08,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:08,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:09,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:09,017 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-05 16:32:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223065317] [2021-06-05 16:32:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:09,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:09,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223065317] [2021-06-05 16:32:09,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223065317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:09,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051695994] [2021-06-05 16:32:09,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:09,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:09,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:09,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051695994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:09,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:09,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:32:09,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619528059] [2021-06-05 16:32:09,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:32:09,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:32:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:32:09,127 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:09,406 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 16:32:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:32:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:09,409 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 16:32:09,410 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 16:32:09,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:32:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 16:32:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 16:32:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 16:32:09,429 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 16:32:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:09,429 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 16:32:09,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 16:32:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:09,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:09,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:09,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:32:09,645 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:09,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-05 16:32:09,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:09,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26255413] [2021-06-05 16:32:09,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:09,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:09,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26255413] [2021-06-05 16:32:09,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26255413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:09,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255135965] [2021-06-05 16:32:09,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:09,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:09,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255135965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:09,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:09,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:32:09,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084898510] [2021-06-05 16:32:09,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:32:09,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:09,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:32:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:32:09,755 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:09,968 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 16:32:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:32:09,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:09,984 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 16:32:09,984 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 16:32:09,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:32:09,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 16:32:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 16:32:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 16:32:10,024 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 16:32:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:10,024 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 16:32:10,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 16:32:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:10,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:10,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:10,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:10,241 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-05 16:32:10,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:10,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496978490] [2021-06-05 16:32:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:10,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:10,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496978490] [2021-06-05 16:32:10,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496978490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:10,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78445291] [2021-06-05 16:32:10,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:10,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:10,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:10,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:32:10,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78445291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:10,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:10,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:32:10,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725627968] [2021-06-05 16:32:10,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:32:10,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:10,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:32:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:32:10,346 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:10,535 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 16:32:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:32:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:10,538 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 16:32:10,538 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 16:32:10,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:32:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 16:32:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 16:32:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 16:32:10,552 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 16:32:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:10,552 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 16:32:10,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 16:32:10,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:10,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:10,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:10,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 16:32:10,764 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-05 16:32:10,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:10,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747413881] [2021-06-05 16:32:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:10,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747413881] [2021-06-05 16:32:10,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747413881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377934187] [2021-06-05 16:32:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:10,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:10,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:10,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377934187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:10,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:10,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:32:10,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174698884] [2021-06-05 16:32:10,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:32:10,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:32:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:32:10,872 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:11,102 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 16:32:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:32:11,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:11,105 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 16:32:11,105 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 16:32:11,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:32:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 16:32:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 16:32:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 16:32:11,118 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 16:32:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:11,118 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 16:32:11,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 16:32:11,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:11,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:11,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:11,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:11,333 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-05 16:32:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:11,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195146177] [2021-06-05 16:32:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:11,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195146177] [2021-06-05 16:32:11,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195146177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:11,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924267485] [2021-06-05 16:32:11,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:11,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:11,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:11,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:11,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924267485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:11,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:11,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:11,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925258837] [2021-06-05 16:32:11,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:11,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:11,504 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:12,007 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 16:32:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:32:12,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:12,013 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 16:32:12,013 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 16:32:12,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:32:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 16:32:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 16:32:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 16:32:12,038 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 16:32:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:12,038 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 16:32:12,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 16:32:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:12,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:12,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:12,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 16:32:12,263 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:12,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-05 16:32:12,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:12,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760122217] [2021-06-05 16:32:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:12,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:12,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760122217] [2021-06-05 16:32:12,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760122217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:12,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102215792] [2021-06-05 16:32:12,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:12,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:12,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102215792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:12,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:12,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:12,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198280858] [2021-06-05 16:32:12,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:12,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:12,410 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:12,854 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 16:32:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:32:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:12,859 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 16:32:12,859 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 16:32:12,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:32:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 16:32:12,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 16:32:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:32:12,884 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:32:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:12,885 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:32:12,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:32:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:12,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:12,887 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:13,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:13,105 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:13,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-05 16:32:13,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:13,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106549807] [2021-06-05 16:32:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:13,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:13,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106549807] [2021-06-05 16:32:13,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106549807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:13,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175994905] [2021-06-05 16:32:13,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:13,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:13,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:13,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175994905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:13,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:13,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:13,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957565809] [2021-06-05 16:32:13,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:13,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:13,244 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:13,674 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 16:32:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:32:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:13,679 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 16:32:13,679 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 16:32:13,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:32:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 16:32:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 16:32:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:32:13,704 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:32:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:13,704 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:32:13,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:32:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:13,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:13,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:13,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 16:32:13,924 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-05 16:32:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:13,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947435539] [2021-06-05 16:32:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:13,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:13,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947435539] [2021-06-05 16:32:13,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947435539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:13,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336648261] [2021-06-05 16:32:13,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:13,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:13,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:13,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:14,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336648261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:14,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:14,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:14,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815142321] [2021-06-05 16:32:14,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:14,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:14,058 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:14,406 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 16:32:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:32:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:14,409 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 16:32:14,409 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 16:32:14,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 209.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:32:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 16:32:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 16:32:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:32:14,432 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:32:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:14,433 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:32:14,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:32:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:14,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:14,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:14,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:14,656 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-05 16:32:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:14,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652723011] [2021-06-05 16:32:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:14,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:14,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652723011] [2021-06-05 16:32:14,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652723011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:14,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132029128] [2021-06-05 16:32:14,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:14,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:14,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:14,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:14,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:14,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132029128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:14,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:14,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139767018] [2021-06-05 16:32:14,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:14,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:14,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:14,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:14,806 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:15,175 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 16:32:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:32:15,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:15,178 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 16:32:15,178 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 16:32:15,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:32:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 16:32:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 16:32:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 16:32:15,195 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 16:32:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:15,195 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 16:32:15,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 16:32:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:15,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:15,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:15,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 16:32:15,397 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-05 16:32:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:15,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090116998] [2021-06-05 16:32:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:15,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:15,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090116998] [2021-06-05 16:32:15,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090116998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:15,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702611828] [2021-06-05 16:32:15,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:15,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:15,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:15,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:15,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702611828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:15,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:15,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:15,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520261800] [2021-06-05 16:32:15,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:15,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:15,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:15,543 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:15,896 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 16:32:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:32:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:15,899 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 16:32:15,899 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 16:32:15,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:32:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 16:32:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 16:32:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 16:32:15,921 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 16:32:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:15,921 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 16:32:15,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:15,921 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 16:32:15,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:15,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:15,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:16,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 16:32:16,137 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:16,137 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-05 16:32:16,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:16,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544296058] [2021-06-05 16:32:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:16,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:16,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544296058] [2021-06-05 16:32:16,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544296058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:16,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521687380] [2021-06-05 16:32:16,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:16,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:16,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:16,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521687380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:16,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:16,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:16,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130557048] [2021-06-05 16:32:16,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:16,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:16,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:16,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:16,283 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:16,640 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 16:32:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:32:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:16,643 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 16:32:16,643 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 16:32:16,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:32:16,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 16:32:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 16:32:16,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 16:32:16,659 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 16:32:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:16,660 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 16:32:16,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 16:32:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:16,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:16,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:16,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 16:32:16,862 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:16,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:16,862 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-05 16:32:16,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:16,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263486287] [2021-06-05 16:32:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:16,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263486287] [2021-06-05 16:32:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263486287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259103364] [2021-06-05 16:32:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:16,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259103364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:16,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:16,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:16,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135667110] [2021-06-05 16:32:16,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:16,976 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:17,233 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 16:32:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:32:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:17,236 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 16:32:17,236 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 16:32:17,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:32:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 16:32:17,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 16:32:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 16:32:17,258 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 16:32:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:17,259 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 16:32:17,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 16:32:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:17,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:17,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:17,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:32:17,482 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-05 16:32:17,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:17,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159780053] [2021-06-05 16:32:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:17,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159780053] [2021-06-05 16:32:17,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159780053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:17,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341667458] [2021-06-05 16:32:17,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:17,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:17,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:17,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341667458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:17,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:17,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:32:17,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463648064] [2021-06-05 16:32:17,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:32:17,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:17,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:32:17,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:32:17,589 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:17,783 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 16:32:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:32:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:17,785 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 16:32:17,785 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 16:32:17,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:32:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 16:32:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 16:32:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 16:32:17,800 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 16:32:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:17,800 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 16:32:17,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 16:32:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:17,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:17,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:18,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:18,024 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-05 16:32:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126447866] [2021-06-05 16:32:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:18,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126447866] [2021-06-05 16:32:18,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126447866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132732288] [2021-06-05 16:32:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:18,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:18,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:18,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:18,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132732288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:18,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:18,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:18,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532241019] [2021-06-05 16:32:18,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:18,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:18,158 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:18,477 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 16:32:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:32:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:18,479 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 16:32:18,479 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 16:32:18,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:32:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 16:32:18,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 16:32:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 16:32:18,496 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 16:32:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:18,496 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 16:32:18,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 16:32:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:18,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:18,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:18,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:18,701 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:18,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-05 16:32:18,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:18,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343418926] [2021-06-05 16:32:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:18,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:18,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343418926] [2021-06-05 16:32:18,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343418926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:18,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225440563] [2021-06-05 16:32:18,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:18,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:18,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:18,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225440563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:18,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:18,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:32:18,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313851743] [2021-06-05 16:32:18,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:32:18,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:18,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:32:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:32:18,826 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:19,069 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 16:32:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:32:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:19,071 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 16:32:19,071 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 16:32:19,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:32:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 16:32:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 16:32:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 16:32:19,087 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 16:32:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:19,087 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 16:32:19,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 16:32:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:32:19,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:19,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:19,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 16:32:19,305 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-05 16:32:19,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:19,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124549094] [2021-06-05 16:32:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:19,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:19,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124549094] [2021-06-05 16:32:19,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124549094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:19,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789460490] [2021-06-05 16:32:19,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:19,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:19,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:19,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:32:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789460490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:19,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:19,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:32:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709807716] [2021-06-05 16:32:19,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:32:19,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:19,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:32:19,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:32:19,436 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:19,606 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 16:32:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:32:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 16:32:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:19,609 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 16:32:19,610 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 16:32:19,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 16:32:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 16:32:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 16:32:19,630 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 16:32:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:19,631 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 16:32:19,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 16:32:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:19,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:19,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:19,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:19,856 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:19,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:19,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-05 16:32:19,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:19,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822944621] [2021-06-05 16:32:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:20,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:20,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822944621] [2021-06-05 16:32:20,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822944621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:20,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791769792] [2021-06-05 16:32:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:20,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:20,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:20,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:20,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:20,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:32:20,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:20,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:20,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:20,833 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:20,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:20,845 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:20,851 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:20,857 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:20,863 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:32:20,869 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:20,876 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:20,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:20,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:20,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:32:20,885 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:20,904 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:20,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:20,905 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:32:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:20,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791769792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:20,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:20,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:32:20,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132683067] [2021-06-05 16:32:20,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:20,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:20,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:20,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:20,941 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:21,642 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 16:32:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:32:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:21,644 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 16:32:21,644 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 16:32:21,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:32:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 16:32:21,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 16:32:21,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 16:32:21,658 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 16:32:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:21,659 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 16:32:21,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 16:32:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:21,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:21,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:21,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:21,861 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-05 16:32:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:21,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375990820] [2021-06-05 16:32:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:22,167 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 16:32:22,292 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-06-05 16:32:22,408 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-06-05 16:32:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:22,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:22,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375990820] [2021-06-05 16:32:22,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375990820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:22,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533911359] [2021-06-05 16:32:22,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:22,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:22,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:22,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:32:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:22,919 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 16:32:22,975 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-05 16:32:22,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:22,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:23,121 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 16:32:23,121 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 16:32:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:23,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:23,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:32:23,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:23,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:23,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:23,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:23,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:32:23,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:23,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:23,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:23,194 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-05 16:32:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:23,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533911359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:23,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:23,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:32:23,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745827365] [2021-06-05 16:32:23,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:23,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:23,232 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:24,269 INFO L93 Difference]: Finished difference Result 1714 states and 5519 transitions. [2021-06-05 16:32:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:32:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:24,271 INFO L225 Difference]: With dead ends: 1714 [2021-06-05 16:32:24,271 INFO L226 Difference]: Without dead ends: 1684 [2021-06-05 16:32:24,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1436.5ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:32:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-05 16:32:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1168. [2021-06-05 16:32:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-06-05 16:32:24,290 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-06-05 16:32:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:24,290 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-06-05 16:32:24,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-06-05 16:32:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:24,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:24,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:24,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:24,513 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-05 16:32:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:24,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769923230] [2021-06-05 16:32:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:24,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:24,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769923230] [2021-06-05 16:32:24,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769923230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:24,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565600273] [2021-06-05 16:32:24,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:25,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:25,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:32:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:32:25,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:32:25,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:32:25,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:32:25,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:32:25,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:25,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:32:25,802 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:32:25,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:32:25,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:32:25,833 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:32:25,841 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:32:25,849 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:32:25,857 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:25,866 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:25,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:25,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:32:25,871 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:25,890 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:25,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:25,891 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:32:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565600273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:32:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925681770] [2021-06-05 16:32:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:32:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:32:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:25,918 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:27,389 INFO L93 Difference]: Finished difference Result 1625 states and 5243 transitions. [2021-06-05 16:32:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:32:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:27,391 INFO L225 Difference]: With dead ends: 1625 [2021-06-05 16:32:27,391 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 16:32:27,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1657.7ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:32:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 16:32:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1198. [2021-06-05 16:32:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-06-05 16:32:27,407 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-06-05 16:32:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:27,407 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-06-05 16:32:27,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-06-05 16:32:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:27,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:27,409 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:27,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 16:32:27,609 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-05 16:32:27,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:27,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307163150] [2021-06-05 16:32:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:27,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307163150] [2021-06-05 16:32:27,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307163150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154880627] [2021-06-05 16:32:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:27,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:32:27,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:32:27,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,265 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:32:28,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:32:28,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:28,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:28,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:32:28,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:28,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:32:28,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,346 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 16:32:28,348 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,359 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:32:28,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:28,371 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,381 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:32:28,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,396 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:28,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 16:32:28,397 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,409 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:32:28,410 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:32:28,421 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,435 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:32:28,436 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,445 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:28,446 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:28,454 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:28,462 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:28,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:32:28,463 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:28,545 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-06-05 16:32:28,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:32:28,547 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-06-05 16:32:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:28,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154880627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:28,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:28,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:32:28,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988074566] [2021-06-05 16:32:28,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:32:28,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:28,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:32:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:28,643 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:30,166 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 16:32:30,335 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 16:32:30,638 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 16:32:30,821 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 16:32:31,280 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 16:32:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:31,578 INFO L93 Difference]: Finished difference Result 2145 states and 6707 transitions. [2021-06-05 16:32:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:32:31,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:31,581 INFO L225 Difference]: With dead ends: 2145 [2021-06-05 16:32:31,581 INFO L226 Difference]: Without dead ends: 2100 [2021-06-05 16:32:31,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2761.7ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:32:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-05 16:32:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1216. [2021-06-05 16:32:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3390946502057615) internal successors, (4057), 1215 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4057 transitions. [2021-06-05 16:32:31,598 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4057 transitions. Word has length 26 [2021-06-05 16:32:31,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:31,598 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 4057 transitions. [2021-06-05 16:32:31,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4057 transitions. [2021-06-05 16:32:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:31,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:31,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:31,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:31,823 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-05 16:32:31,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:31,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823609834] [2021-06-05 16:32:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:32,195 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 16:32:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:32,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:32,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823609834] [2021-06-05 16:32:32,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823609834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:32,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073878179] [2021-06-05 16:32:32,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:32,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:32:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:32:32,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:32:32,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:32:32,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:32,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:32:32,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:32:32,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:32:32,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:32:33,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:32:33,016 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:33,026 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:32:33,037 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:32:33,047 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:32:33,056 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:32:33,065 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:33,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:33,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:32:33,072 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:33,094 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:33,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:33,096 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:32:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:33,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073878179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:33,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:33,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:32:33,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291454700] [2021-06-05 16:32:33,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:32:33,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:32:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:33,126 INFO L87 Difference]: Start difference. First operand 1216 states and 4057 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:34,330 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-06-05 16:32:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:36,043 INFO L93 Difference]: Finished difference Result 1915 states and 6096 transitions. [2021-06-05 16:32:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:32:36,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:36,046 INFO L225 Difference]: With dead ends: 1915 [2021-06-05 16:32:36,046 INFO L226 Difference]: Without dead ends: 1900 [2021-06-05 16:32:36,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2925.8ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:32:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-06-05 16:32:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1227. [2021-06-05 16:32:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3450244698205545) internal successors, (4101), 1226 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4101 transitions. [2021-06-05 16:32:36,062 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4101 transitions. Word has length 26 [2021-06-05 16:32:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:36,062 INFO L482 AbstractCegarLoop]: Abstraction has 1227 states and 4101 transitions. [2021-06-05 16:32:36,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4101 transitions. [2021-06-05 16:32:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:36,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:36,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:36,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:36,264 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:36,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-05 16:32:36,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:36,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416271129] [2021-06-05 16:32:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:36,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416271129] [2021-06-05 16:32:36,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416271129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:36,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483449358] [2021-06-05 16:32:36,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:36,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:36,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:32:36,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:37,371 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:32:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:32:37,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,451 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:32:37,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:32:37,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,489 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:32:37,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:32:37,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,536 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-05 16:32:37,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:32:37,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,585 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:32:37,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 16:32:37,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,614 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:32:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:32:37,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,661 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:32:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 16:32:37,678 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,727 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:32:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:32:37,748 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,782 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-05 16:32:37,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:32:37,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,826 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:32:37,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 16:32:37,847 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,897 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:32:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 16:32:37,906 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,930 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:32:37,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 1 [2021-06-05 16:32:37,931 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,969 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:32:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 16:32:37,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:37,993 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:32:37,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:32:37,994 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:38,029 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:32:38,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 16:32:38,053 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:38,085 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:32:38,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 16:32:38,090 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:38,363 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-06-05 16:32:38,364 INFO L628 ElimStorePlain]: treesize reduction 296, result has 49.5 percent of original size [2021-06-05 16:32:38,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:32:38,399 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:341 [2021-06-05 16:32:38,650 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 16:32:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:38,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483449358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:38,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:38,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:32:38,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422134920] [2021-06-05 16:32:38,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:32:38,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:38,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:32:38,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:32:38,854 INFO L87 Difference]: Start difference. First operand 1227 states and 4101 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:40,560 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 16:32:40,996 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-05 16:32:41,353 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-06-05 16:32:41,793 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-06-05 16:32:42,076 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-06-05 16:32:42,605 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-05 16:32:42,968 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 57 [2021-06-05 16:32:43,146 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 37 [2021-06-05 16:32:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:43,665 INFO L93 Difference]: Finished difference Result 2515 states and 7728 transitions. [2021-06-05 16:32:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:32:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:43,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:43,669 INFO L225 Difference]: With dead ends: 2515 [2021-06-05 16:32:43,669 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 16:32:43,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5056.8ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:32:43,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 16:32:43,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 1399. [2021-06-05 16:32:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3125894134477827) internal successors, (4631), 1398 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:43,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4631 transitions. [2021-06-05 16:32:43,688 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4631 transitions. Word has length 26 [2021-06-05 16:32:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:43,689 INFO L482 AbstractCegarLoop]: Abstraction has 1399 states and 4631 transitions. [2021-06-05 16:32:43,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:43,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4631 transitions. [2021-06-05 16:32:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:43,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:43,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:43,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 16:32:43,900 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:43,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-05 16:32:43,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:43,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97664437] [2021-06-05 16:32:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:44,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:44,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97664437] [2021-06-05 16:32:44,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97664437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:44,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733675304] [2021-06-05 16:32:44,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:44,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:32:44,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:44,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:32:44,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:44,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:32:44,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:44,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:44,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:44,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:44,674 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:32:44,681 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:44,688 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:44,695 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:44,702 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:44,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:44,721 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:44,728 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:44,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:44,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:44,732 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:44,754 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:44,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:44,756 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:32:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:44,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733675304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:44,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:44,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:32:44,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13611779] [2021-06-05 16:32:44,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:44,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:44,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:44,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:44,799 INFO L87 Difference]: Start difference. First operand 1399 states and 4631 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:45,636 INFO L93 Difference]: Finished difference Result 1804 states and 5851 transitions. [2021-06-05 16:32:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:32:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:45,639 INFO L225 Difference]: With dead ends: 1804 [2021-06-05 16:32:45,639 INFO L226 Difference]: Without dead ends: 1789 [2021-06-05 16:32:45,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1053.5ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:32:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-06-05 16:32:45,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1410. [2021-06-05 16:32:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3101490418736694) internal successors, (4664), 1409 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4664 transitions. [2021-06-05 16:32:45,657 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4664 transitions. Word has length 26 [2021-06-05 16:32:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:45,657 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4664 transitions. [2021-06-05 16:32:45,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4664 transitions. [2021-06-05 16:32:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:45,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:45,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:45,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 16:32:45,859 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:45,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-05 16:32:45,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:45,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394239173] [2021-06-05 16:32:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:46,151 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 16:32:46,284 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-05 16:32:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:46,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:46,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394239173] [2021-06-05 16:32:46,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394239173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:46,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567940870] [2021-06-05 16:32:46,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:46,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:32:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:32:46,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:46,789 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 16:32:46,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:32:46,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:46,927 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:32:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:32:46,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:47,255 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 125 [2021-06-05 16:32:47,256 INFO L628 ElimStorePlain]: treesize reduction 146, result has 72.2 percent of original size [2021-06-05 16:32:47,279 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:32:47,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:32:47,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:47,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:47,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:32:47,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:47,568 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 123 [2021-06-05 16:32:47,569 INFO L628 ElimStorePlain]: treesize reduction 31, result has 91.5 percent of original size [2021-06-05 16:32:47,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:47,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:32:47,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:47,713 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:32:47,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:47,731 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:32:47,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:32:47,733 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:47,853 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 16:32:47,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:47,873 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:32:47,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:32:47,878 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:47,999 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:32:47,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:48,020 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:32:48,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:32:48,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:48,145 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:32:48,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:48,165 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:32:48,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:32:48,167 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:48,275 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:32:48,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:48,292 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:32:48,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:32:48,293 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:48,401 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:32:48,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:48,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:32:48,414 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:331 [2021-06-05 16:32:48,585 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-06-05 16:32:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:48,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567940870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:48,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:48,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:32:48,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680449798] [2021-06-05 16:32:48,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:32:48,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:48,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:32:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:32:48,654 INFO L87 Difference]: Start difference. First operand 1410 states and 4664 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:49,506 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-06-05 16:32:50,094 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:32:50,306 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-06-05 16:32:50,681 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 16:32:51,018 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 16:32:51,438 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 16:32:51,906 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-06-05 16:32:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:52,044 INFO L93 Difference]: Finished difference Result 2138 states and 6778 transitions. [2021-06-05 16:32:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:32:52,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:52,047 INFO L225 Difference]: With dead ends: 2138 [2021-06-05 16:32:52,047 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 16:32:52,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 3795.1ms TimeCoverageRelationStatistics Valid=295, Invalid=1685, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:32:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 16:32:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1416. [2021-06-05 16:32:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.3123674911660776) internal successors, (4687), 1415 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4687 transitions. [2021-06-05 16:32:52,066 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4687 transitions. Word has length 26 [2021-06-05 16:32:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:52,066 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4687 transitions. [2021-06-05 16:32:52,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4687 transitions. [2021-06-05 16:32:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:52,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:52,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:52,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 16:32:52,269 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-05 16:32:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:52,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557914511] [2021-06-05 16:32:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:52,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:52,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557914511] [2021-06-05 16:32:52,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557914511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:52,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876879776] [2021-06-05 16:32:52,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:52,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:32:52,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:52,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:32:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:53,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:53,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,287 INFO L628 ElimStorePlain]: treesize reduction 130, result has 44.0 percent of original size [2021-06-05 16:32:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:32:53,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:53,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:32:53,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:53,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:53,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:53,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:53,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:53,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:32:53,387 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:29 [2021-06-05 16:32:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:53,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876879776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:53,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:53,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:32:53,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111415117] [2021-06-05 16:32:53,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:32:53,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:32:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:32:53,420 INFO L87 Difference]: Start difference. First operand 1416 states and 4687 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:54,008 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 46 [2021-06-05 16:32:54,245 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 16:32:54,416 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-06-05 16:32:54,776 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2021-06-05 16:32:54,938 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 16:32:55,215 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2021-06-05 16:32:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:55,317 INFO L93 Difference]: Finished difference Result 2242 states and 7149 transitions. [2021-06-05 16:32:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:32:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:55,320 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 16:32:55,320 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 16:32:55,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2074.8ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:32:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 16:32:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-06-05 16:32:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.322491349480969) internal successors, (4801), 1445 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4801 transitions. [2021-06-05 16:32:55,349 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4801 transitions. Word has length 26 [2021-06-05 16:32:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:55,349 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4801 transitions. [2021-06-05 16:32:55,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:55,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4801 transitions. [2021-06-05 16:32:55,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:55,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:55,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:55,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 16:32:55,552 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-05 16:32:55,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:55,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057427258] [2021-06-05 16:32:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:55,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:55,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057427258] [2021-06-05 16:32:55,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057427258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:55,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068735620] [2021-06-05 16:32:55,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:55,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:32:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:32:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:56,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:56,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:56,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:56,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:56,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:56,311 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:32:56,317 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:32:56,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:32:56,329 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:56,335 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:56,340 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:56,345 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:32:56,351 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:56,356 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:56,363 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:56,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:32:56,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:32:56,367 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:56,385 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:32:56,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:32:56,386 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:32:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:56,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068735620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:56,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:56,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:32:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734892534] [2021-06-05 16:32:56,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:32:56,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:32:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:32:56,415 INFO L87 Difference]: Start difference. First operand 1446 states and 4801 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:32:56,999 INFO L93 Difference]: Finished difference Result 1753 states and 5743 transitions. [2021-06-05 16:32:57,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:32:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:32:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:32:57,002 INFO L225 Difference]: With dead ends: 1753 [2021-06-05 16:32:57,002 INFO L226 Difference]: Without dead ends: 1738 [2021-06-05 16:32:57,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 770.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:32:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-05 16:32:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1455. [2021-06-05 16:32:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3266850068775793) internal successors, (4837), 1454 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:57,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4837 transitions. [2021-06-05 16:32:57,019 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4837 transitions. Word has length 26 [2021-06-05 16:32:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:32:57,019 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4837 transitions. [2021-06-05 16:32:57,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4837 transitions. [2021-06-05 16:32:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:32:57,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:32:57,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:32:57,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:57,222 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:32:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:32:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-06-05 16:32:57,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:32:57,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053556607] [2021-06-05 16:32:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:32:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:32:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:57,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:32:57,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053556607] [2021-06-05 16:32:57,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053556607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:57,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782036207] [2021-06-05 16:32:57,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:32:57,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:32:57,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:32:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:32:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:32:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:57,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:57,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:32:57,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:57,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:57,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:32:57,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:58,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:32:58,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,019 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:58,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:32:58,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,029 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:58,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,039 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:58,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,048 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:58,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,060 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:58,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:32:58,062 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:32:58,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:32:58,077 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,086 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:58,087 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,095 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:58,096 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,105 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:32:58,106 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,114 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:32:58,114 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,122 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:58,123 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,131 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:32:58,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:32:58,131 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:32:58,139 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:32:58,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:32:58,140 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:32:58,236 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-06-05 16:32:58,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:32:58,238 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-06-05 16:32:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:32:58,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782036207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:32:58,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:32:58,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:32:58,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788510560] [2021-06-05 16:32:58,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:32:58,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:32:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:32:58,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:32:58,334 INFO L87 Difference]: Start difference. First operand 1455 states and 4837 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:32:59,240 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 16:32:59,655 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-06-05 16:32:59,845 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-06-05 16:33:00,063 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-05 16:33:00,666 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-06-05 16:33:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:00,842 INFO L93 Difference]: Finished difference Result 2493 states and 7968 transitions. [2021-06-05 16:33:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:33:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:00,845 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 16:33:00,845 INFO L226 Difference]: Without dead ends: 2463 [2021-06-05 16:33:00,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2396.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:33:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-05 16:33:00,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1468. [2021-06-05 16:33:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3340149965916837) internal successors, (4891), 1467 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4891 transitions. [2021-06-05 16:33:00,866 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4891 transitions. Word has length 26 [2021-06-05 16:33:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:00,866 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4891 transitions. [2021-06-05 16:33:00,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4891 transitions. [2021-06-05 16:33:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:00,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:00,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:01,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 16:33:01,068 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:01,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1627125609, now seen corresponding path program 12 times [2021-06-05 16:33:01,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:01,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598222995] [2021-06-05 16:33:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:01,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:01,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598222995] [2021-06-05 16:33:01,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598222995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:01,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413392854] [2021-06-05 16:33:01,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:01,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:01,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:33:01,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,708 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:33:01,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:01,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-05 16:33:01,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,744 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:33:01,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,761 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:01,763 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,778 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:01,779 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,796 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:33:01,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,817 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:01,819 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,834 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:01,835 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,851 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:33:01,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,863 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:33:01,864 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,875 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:33:01,877 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,888 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 16:33:01,889 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,899 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:01,900 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:01,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-05 16:33:01,914 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:01,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:01,921 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:01,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:33:01,922 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:01,994 INFO L628 ElimStorePlain]: treesize reduction 19, result has 82.2 percent of original size [2021-06-05 16:33:01,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:01,995 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-05 16:33:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:02,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413392854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:02,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:02,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879461928] [2021-06-05 16:33:02,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:02,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:02,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:02,092 INFO L87 Difference]: Start difference. First operand 1468 states and 4891 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:02,989 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 16:33:03,734 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-05 16:33:04,209 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 16:33:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:04,607 INFO L93 Difference]: Finished difference Result 2313 states and 7429 transitions. [2021-06-05 16:33:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:33:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:04,610 INFO L225 Difference]: With dead ends: 2313 [2021-06-05 16:33:04,610 INFO L226 Difference]: Without dead ends: 2283 [2021-06-05 16:33:04,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2435.5ms TimeCoverageRelationStatistics Valid=388, Invalid=1868, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:33:04,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-06-05 16:33:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1477. [2021-06-05 16:33:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.3401084010840107) internal successors, (4930), 1476 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4930 transitions. [2021-06-05 16:33:04,634 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4930 transitions. Word has length 26 [2021-06-05 16:33:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:04,634 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4930 transitions. [2021-06-05 16:33:04,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4930 transitions. [2021-06-05 16:33:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:04,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:04,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:04,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-05 16:33:04,836 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-05 16:33:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:04,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529312785] [2021-06-05 16:33:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:05,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529312785] [2021-06-05 16:33:05,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529312785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:05,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889773312] [2021-06-05 16:33:05,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:05,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:05,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:05,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:33:05,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:05,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:33:05,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:05,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:05,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:33:05,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:33:05,796 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:33:05,805 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:05,816 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:05,824 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:33:05,832 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:05,839 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:33:05,847 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:33:05,854 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:05,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:05,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:33:05,874 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:05,899 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:33:05,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:05,901 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:33:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:05,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889773312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:05,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:05,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:33:05,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138454729] [2021-06-05 16:33:05,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:05,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:05,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:05,940 INFO L87 Difference]: Start difference. First operand 1477 states and 4930 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:06,692 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 16:33:07,204 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-05 16:33:07,862 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 16:33:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:09,167 INFO L93 Difference]: Finished difference Result 3323 states and 10316 transitions. [2021-06-05 16:33:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:33:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:09,171 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 16:33:09,172 INFO L226 Difference]: Without dead ends: 3278 [2021-06-05 16:33:09,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2912.9ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:33:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3278 states. [2021-06-05 16:33:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3278 to 1496. [2021-06-05 16:33:09,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3578595317725752) internal successors, (5020), 1495 states have internal predecessors, (5020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5020 transitions. [2021-06-05 16:33:09,220 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5020 transitions. Word has length 26 [2021-06-05 16:33:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:09,220 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5020 transitions. [2021-06-05 16:33:09,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5020 transitions. [2021-06-05 16:33:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:09,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:09,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:09,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:09,423 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-05 16:33:09,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:09,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871484140] [2021-06-05 16:33:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:09,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871484140] [2021-06-05 16:33:09,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871484140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365029138] [2021-06-05 16:33:09,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:09,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:09,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:10,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:33:10,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:10,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:33:10,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:33:10,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:10,381 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:10,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:33:10,399 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:10,410 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:33:10,420 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:10,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:33:10,439 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:33:10,448 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:33:10,455 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:10,462 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:10,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:10,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:33:10,466 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:10,485 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:33:10,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:10,486 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:33:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:10,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365029138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:10,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:10,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:33:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548444959] [2021-06-05 16:33:10,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:10,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:10,516 INFO L87 Difference]: Start difference. First operand 1496 states and 5020 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:11,389 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 16:33:11,914 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 16:33:12,501 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 16:33:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:13,454 INFO L93 Difference]: Finished difference Result 3094 states and 9789 transitions. [2021-06-05 16:33:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:33:13,455 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:13,459 INFO L225 Difference]: With dead ends: 3094 [2021-06-05 16:33:13,460 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 16:33:13,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2778.6ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:33:13,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 16:33:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1496. [2021-06-05 16:33:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3585284280936456) internal successors, (5021), 1495 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5021 transitions. [2021-06-05 16:33:13,484 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5021 transitions. Word has length 26 [2021-06-05 16:33:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:13,484 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5021 transitions. [2021-06-05 16:33:13,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:13,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5021 transitions. [2021-06-05 16:33:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:13,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:13,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:13,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable808,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:13,687 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:13,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:13,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-05 16:33:13,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:13,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919161594] [2021-06-05 16:33:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:13,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:13,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919161594] [2021-06-05 16:33:13,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919161594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:13,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236389370] [2021-06-05 16:33:13,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:14,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:14,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:14,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:14,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,604 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:33:14,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:33:14,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,630 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:33:14,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,665 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:33:14,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 16:33:14,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,692 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:33:14,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,747 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:33:14,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,768 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:33:14,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,800 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:33:14,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:33:14,802 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:14,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:33:14,841 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,861 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:33:14,862 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,884 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:33:14,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 16:33:14,886 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,908 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:33:14,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:33:14,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,923 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:14,924 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,954 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:33:14,955 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,969 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:33:14,970 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,983 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:33:14,984 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:14,992 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:33:14,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:33:14,993 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:15,074 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-06-05 16:33:15,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:33:15,076 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 16:33:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:15,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236389370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:15,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:15,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:33:15,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065387587] [2021-06-05 16:33:15,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:15,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:15,156 INFO L87 Difference]: Start difference. First operand 1496 states and 5021 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:15,984 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 16:33:16,570 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 16:33:17,160 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 16:33:17,869 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-05 16:33:18,018 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-06-05 16:33:18,260 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-06-05 16:33:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:18,812 INFO L93 Difference]: Finished difference Result 3560 states and 11117 transitions. [2021-06-05 16:33:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:33:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:18,817 INFO L225 Difference]: With dead ends: 3560 [2021-06-05 16:33:18,817 INFO L226 Difference]: Without dead ends: 3500 [2021-06-05 16:33:18,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3293.2ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:33:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-05 16:33:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 1512. [2021-06-05 16:33:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.370615486432826) internal successors, (5093), 1511 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5093 transitions. [2021-06-05 16:33:18,844 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5093 transitions. Word has length 26 [2021-06-05 16:33:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5093 transitions. [2021-06-05 16:33:18,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5093 transitions. [2021-06-05 16:33:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:18,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:18,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:19,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:19,047 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-06-05 16:33:19,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:19,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785268757] [2021-06-05 16:33:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:19,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:19,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785268757] [2021-06-05 16:33:19,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785268757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:19,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832002582] [2021-06-05 16:33:19,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:19,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:19,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:19,737 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:19,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:19,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:19,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:19,759 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:19,765 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:33:19,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:19,791 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:19,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:19,803 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:19,808 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:19,812 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:19,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:19,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:19,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:19,834 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:33:19,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:19,835 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:33:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832002582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:19,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102044046] [2021-06-05 16:33:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:19,859 INFO L87 Difference]: Start difference. First operand 1512 states and 5093 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:20,510 INFO L93 Difference]: Finished difference Result 1895 states and 6252 transitions. [2021-06-05 16:33:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:33:20,510 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:20,512 INFO L225 Difference]: With dead ends: 1895 [2021-06-05 16:33:20,512 INFO L226 Difference]: Without dead ends: 1880 [2021-06-05 16:33:20,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 825.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:33:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-06-05 16:33:20,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1520. [2021-06-05 16:33:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.366688610928242) internal successors, (5114), 1519 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5114 transitions. [2021-06-05 16:33:20,537 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5114 transitions. Word has length 26 [2021-06-05 16:33:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:20,537 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5114 transitions. [2021-06-05 16:33:20,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5114 transitions. [2021-06-05 16:33:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:20,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:20,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:20,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-06-05 16:33:20,757 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:20,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:20,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 14 times [2021-06-05 16:33:20,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:20,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535965673] [2021-06-05 16:33:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:20,923 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 16:33:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:21,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:21,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535965673] [2021-06-05 16:33:21,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535965673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:21,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137516632] [2021-06-05 16:33:21,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:21,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:21,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:21,528 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:21,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:33:21,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,538 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:21,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,547 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:21,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,557 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:21,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,568 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:21,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,577 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:21,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,597 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:21,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:33:21,600 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:21,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:33:21,620 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,639 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:21,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:33:21,646 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,655 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:21,656 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,675 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:21,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:33:21,676 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,689 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 16:33:21,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-06-05 16:33:21,690 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,699 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:21,700 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,709 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:21,710 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,718 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:21,719 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,725 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:21,726 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:21,859 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-06-05 16:33:21,859 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-06-05 16:33:21,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:33:21,862 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-06-05 16:33:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:22,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137516632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:22,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:22,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:33:22,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477980320] [2021-06-05 16:33:22,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:22,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:22,092 INFO L87 Difference]: Start difference. First operand 1520 states and 5114 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:22,920 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-05 16:33:23,338 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-06-05 16:33:23,637 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 16:33:23,858 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:33:24,059 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 16:33:24,518 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-06-05 16:33:24,936 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 16:33:25,073 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-06-05 16:33:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:25,160 INFO L93 Difference]: Finished difference Result 2084 states and 6791 transitions. [2021-06-05 16:33:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:33:25,160 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:25,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:25,163 INFO L225 Difference]: With dead ends: 2084 [2021-06-05 16:33:25,163 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 16:33:25,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 3178.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:33:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 16:33:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1516. [2021-06-05 16:33:25,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3755775577557756) internal successors, (5114), 1515 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5114 transitions. [2021-06-05 16:33:25,181 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5114 transitions. Word has length 26 [2021-06-05 16:33:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:25,181 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5114 transitions. [2021-06-05 16:33:25,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5114 transitions. [2021-06-05 16:33:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:25,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:25,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:25,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:25,385 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:25,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1175939077, now seen corresponding path program 15 times [2021-06-05 16:33:25,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:25,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339071981] [2021-06-05 16:33:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:25,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339071981] [2021-06-05 16:33:25,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339071981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384050947] [2021-06-05 16:33:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:25,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:25,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:25,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:25,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:26,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:26,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:26,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,043 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:26,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,055 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:26,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,066 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:26,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:26,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:33:26,079 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,088 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:26,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,097 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:26,098 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:26,108 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,120 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:26,121 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:26,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:33:26,136 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,147 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:26,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:26,148 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:26,157 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,165 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:26,166 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,173 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:26,174 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,184 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:26,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:26,185 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:26,190 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:26,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:26,191 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:26,279 INFO L628 ElimStorePlain]: treesize reduction 60, result has 57.4 percent of original size [2021-06-05 16:33:26,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:33:26,282 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-06-05 16:33:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:26,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384050947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:26,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:26,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:33:26,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953755104] [2021-06-05 16:33:26,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:26,372 INFO L87 Difference]: Start difference. First operand 1516 states and 5114 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:26,836 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-05 16:33:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:27,453 INFO L93 Difference]: Finished difference Result 2050 states and 6744 transitions. [2021-06-05 16:33:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:33:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:27,456 INFO L225 Difference]: With dead ends: 2050 [2021-06-05 16:33:27,456 INFO L226 Difference]: Without dead ends: 2035 [2021-06-05 16:33:27,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1185.2ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:33:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-06-05 16:33:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1516. [2021-06-05 16:33:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3755775577557756) internal successors, (5114), 1515 states have internal predecessors, (5114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5114 transitions. [2021-06-05 16:33:27,477 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5114 transitions. Word has length 26 [2021-06-05 16:33:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:27,477 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5114 transitions. [2021-06-05 16:33:27,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5114 transitions. [2021-06-05 16:33:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:27,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:27,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:27,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-05 16:33:27,681 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1368330285, now seen corresponding path program 16 times [2021-06-05 16:33:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:27,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624310920] [2021-06-05 16:33:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:28,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624310920] [2021-06-05 16:33:28,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624310920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156066236] [2021-06-05 16:33:28,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:28,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:28,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:28,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:28,319 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:33:28,510 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-06-05 16:33:28,567 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_38], 2=[A, v_prenex_37]} [2021-06-05 16:33:28,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:28,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,676 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 16:33:28,677 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 16:33:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:33:28,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:28,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:28,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:33:28,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:28,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:28,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:33:28,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-05 16:33:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:28,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156066236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:28,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:28,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:28,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440664397] [2021-06-05 16:33:28,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:28,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:28,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:28,764 INFO L87 Difference]: Start difference. First operand 1516 states and 5114 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:29,698 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:33:30,019 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-06-05 16:33:30,179 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-05 16:33:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:30,411 INFO L93 Difference]: Finished difference Result 2399 states and 7708 transitions. [2021-06-05 16:33:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:33:30,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:30,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:30,415 INFO L225 Difference]: With dead ends: 2399 [2021-06-05 16:33:30,415 INFO L226 Difference]: Without dead ends: 2354 [2021-06-05 16:33:30,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1884.3ms TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:33:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-06-05 16:33:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 1531. [2021-06-05 16:33:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 3.3816993464052287) internal successors, (5174), 1530 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 5174 transitions. [2021-06-05 16:33:30,440 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 5174 transitions. Word has length 26 [2021-06-05 16:33:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:30,440 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 5174 transitions. [2021-06-05 16:33:30,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 5174 transitions. [2021-06-05 16:33:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:30,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:30,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:30,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:30,643 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:30,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1309104231, now seen corresponding path program 17 times [2021-06-05 16:33:30,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:30,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821220754] [2021-06-05 16:33:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:30,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821220754] [2021-06-05 16:33:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821220754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410198690] [2021-06-05 16:33:30,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:30,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:30,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:33:30,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:31,273 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:33:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:33:31,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,690 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-05 16:33:31,690 INFO L628 ElimStorePlain]: treesize reduction 116, result has 75.0 percent of original size [2021-06-05 16:33:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,706 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:31,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:31,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:31,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:31,965 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 16:33:31,965 INFO L628 ElimStorePlain]: treesize reduction 20, result has 93.6 percent of original size [2021-06-05 16:33:31,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:31,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:33:31,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,092 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:33:32,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:32,112 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:32,126 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,325 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-06-05 16:33:32,325 INFO L628 ElimStorePlain]: treesize reduction 16, result has 93.2 percent of original size [2021-06-05 16:33:32,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,337 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:32,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:32,338 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,433 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:33:32,435 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:33:32,525 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:32,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:32,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:32,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:32,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:32,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:32,691 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:479, output treesize:150 [2021-06-05 16:33:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:32,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410198690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:32,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:32,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:33:32,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479510486] [2021-06-05 16:33:32,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:32,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:32,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:32,823 INFO L87 Difference]: Start difference. First operand 1531 states and 5174 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:34,076 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 16:33:34,258 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 16:33:34,559 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 16:33:35,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:35,074 INFO L93 Difference]: Finished difference Result 2633 states and 8507 transitions. [2021-06-05 16:33:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:33:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:35,078 INFO L225 Difference]: With dead ends: 2633 [2021-06-05 16:33:35,078 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 16:33:35,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2255.4ms TimeCoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:33:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 16:33:35,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1532. [2021-06-05 16:33:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1531 states have (on average 3.3860222077073807) internal successors, (5184), 1531 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 5184 transitions. [2021-06-05 16:33:35,111 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 5184 transitions. Word has length 26 [2021-06-05 16:33:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:35,111 INFO L482 AbstractCegarLoop]: Abstraction has 1532 states and 5184 transitions. [2021-06-05 16:33:35,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:35,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 5184 transitions. [2021-06-05 16:33:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:35,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:35,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:35,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1182 [2021-06-05 16:33:35,337 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 18 times [2021-06-05 16:33:35,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:35,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430172980] [2021-06-05 16:33:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:35,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:35,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430172980] [2021-06-05 16:33:35,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430172980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:35,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088338748] [2021-06-05 16:33:35,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:35,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:35,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:33:36,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:36,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:36,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:36,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:33:36,052 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:36,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:36,065 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:36,073 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:36,079 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:36,085 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:36,090 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:36,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:36,103 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:36,109 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:36,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:36,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:36,112 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:36,131 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:33:36,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:36,132 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:33:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088338748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:36,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:36,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:33:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671598790] [2021-06-05 16:33:36,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:36,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:36,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:36,158 INFO L87 Difference]: Start difference. First operand 1532 states and 5184 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:37,170 INFO L93 Difference]: Finished difference Result 2023 states and 6645 transitions. [2021-06-05 16:33:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:33:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:37,173 INFO L225 Difference]: With dead ends: 2023 [2021-06-05 16:33:37,173 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 16:33:37,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1076.4ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:33:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 16:33:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1567. [2021-06-05 16:33:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.3812260536398466) internal successors, (5295), 1566 states have internal predecessors, (5295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5295 transitions. [2021-06-05 16:33:37,197 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5295 transitions. Word has length 26 [2021-06-05 16:33:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:37,197 INFO L482 AbstractCegarLoop]: Abstraction has 1567 states and 5295 transitions. [2021-06-05 16:33:37,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5295 transitions. [2021-06-05 16:33:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:37,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:37,199 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:37,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 16:33:37,400 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 19 times [2021-06-05 16:33:37,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:37,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810946383] [2021-06-05 16:33:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:37,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810946383] [2021-06-05 16:33:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810946383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103203113] [2021-06-05 16:33:37,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:37,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:37,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:37,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:37,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,977 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:37,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:37,989 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:37,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:37,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:37,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,000 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:38,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,009 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:38,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,018 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:38,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,031 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:38,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:38,032 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,041 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:38,041 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:38,064 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,073 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:38,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:38,083 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:38,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:38,095 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:38,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:33:38,108 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,116 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:33:38,117 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:38,123 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:38,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:33:38,123 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:38,220 INFO L628 ElimStorePlain]: treesize reduction 26, result has 82.8 percent of original size [2021-06-05 16:33:38,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:33:38,222 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:91 [2021-06-05 16:33:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:38,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103203113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:38,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:38,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:38,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764451503] [2021-06-05 16:33:38,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:38,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:38,306 INFO L87 Difference]: Start difference. First operand 1567 states and 5295 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:39,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:39,209 INFO L93 Difference]: Finished difference Result 2240 states and 7336 transitions. [2021-06-05 16:33:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:33:39,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:39,212 INFO L225 Difference]: With dead ends: 2240 [2021-06-05 16:33:39,212 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 16:33:39,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1004.2ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:33:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 16:33:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1570. [2021-06-05 16:33:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.3817718291905674) internal successors, (5306), 1569 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5306 transitions. [2021-06-05 16:33:39,232 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5306 transitions. Word has length 26 [2021-06-05 16:33:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:39,232 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5306 transitions. [2021-06-05 16:33:39,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5306 transitions. [2021-06-05 16:33:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:39,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:39,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:39,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:39,435 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:39,436 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 20 times [2021-06-05 16:33:39,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:39,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746242945] [2021-06-05 16:33:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:39,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:39,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746242945] [2021-06-05 16:33:39,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746242945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:39,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90307460] [2021-06-05 16:33:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:39,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:33:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:39,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,201 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:40,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:33:40,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:33:40,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,350 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:33:40,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,373 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:40,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:33:40,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,393 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:40,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:33:40,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,522 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:33:40,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,545 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:40,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:33:40,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,565 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:40,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:33:40,568 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,682 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 16:33:40,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:40,703 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:40,718 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:40,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:40,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:40,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:40,831 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:220 [2021-06-05 16:33:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:40,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90307460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:40,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:40,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:33:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558660032] [2021-06-05 16:33:40,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:40,994 INFO L87 Difference]: Start difference. First operand 1570 states and 5306 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:41,996 INFO L93 Difference]: Finished difference Result 1853 states and 6135 transitions. [2021-06-05 16:33:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:33:41,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:41,999 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 16:33:41,999 INFO L226 Difference]: Without dead ends: 1828 [2021-06-05 16:33:41,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1169.0ms TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:33:42,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-06-05 16:33:42,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1583. [2021-06-05 16:33:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.3874841972187104) internal successors, (5359), 1582 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5359 transitions. [2021-06-05 16:33:42,018 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5359 transitions. Word has length 26 [2021-06-05 16:33:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:42,018 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5359 transitions. [2021-06-05 16:33:42,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5359 transitions. [2021-06-05 16:33:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:42,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:42,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:42,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:42,226 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-06-05 16:33:42,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:42,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610153289] [2021-06-05 16:33:42,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:42,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610153289] [2021-06-05 16:33:42,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610153289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:42,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450814040] [2021-06-05 16:33:42,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:42,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:33:42,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:42,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:42,945 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:33:43,186 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_67, v_prenex_66], 3=[v_prenex_68]} [2021-06-05 16:33:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:43,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:33:43,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:43,325 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 16:33:43,326 INFO L628 ElimStorePlain]: treesize reduction 123, result has 44.1 percent of original size [2021-06-05 16:33:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:43,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:43,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:33:43,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:43,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:33:43,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:43,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:43,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 16:33:43,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:43,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:43,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:43,413 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:234, output treesize:20 [2021-06-05 16:33:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:43,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450814040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:43,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:43,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:43,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836483846] [2021-06-05 16:33:43,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:43,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:43,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:43,467 INFO L87 Difference]: Start difference. First operand 1583 states and 5359 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:44,214 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:33:44,438 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2021-06-05 16:33:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:44,663 INFO L93 Difference]: Finished difference Result 2166 states and 7091 transitions. [2021-06-05 16:33:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:33:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:44,666 INFO L225 Difference]: With dead ends: 2166 [2021-06-05 16:33:44,666 INFO L226 Difference]: Without dead ends: 2121 [2021-06-05 16:33:44,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1439.9ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:33:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-06-05 16:33:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1613. [2021-06-05 16:33:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 3.3957816377171217) internal successors, (5474), 1612 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 5474 transitions. [2021-06-05 16:33:44,688 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 5474 transitions. Word has length 26 [2021-06-05 16:33:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:44,688 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 5474 transitions. [2021-06-05 16:33:44,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 5474 transitions. [2021-06-05 16:33:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:44,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:44,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:44,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-06-05 16:33:44,891 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-06-05 16:33:44,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:44,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820605152] [2021-06-05 16:33:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:45,262 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-05 16:33:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:45,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820605152] [2021-06-05 16:33:45,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820605152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502358705] [2021-06-05 16:33:45,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:45,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:33:45,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:45,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:45,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:45,671 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:33:45,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,784 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:45,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:33:45,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:45,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:45,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:33:45,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,103 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-06-05 16:33:46,104 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-06-05 16:33:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,117 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:46,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:46,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,253 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:33:46,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:46,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:46,287 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,521 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2021-06-05 16:33:46,521 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.4 percent of original size [2021-06-05 16:33:46,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,536 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:46,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:33:46,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,644 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:33:46,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:33:46,659 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,763 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:33:46,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,775 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:46,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:46,777 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:33:46,889 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:46,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:46,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:46,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:46,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:47,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:33:47,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:47,006 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:47,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:47,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:47,083 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-06-05 16:33:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502358705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:47,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:47,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:33:47,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144051847] [2021-06-05 16:33:47,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:47,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:47,218 INFO L87 Difference]: Start difference. First operand 1613 states and 5474 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:48,075 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:33:48,230 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 16:33:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:48,419 INFO L93 Difference]: Finished difference Result 2386 states and 7813 transitions. [2021-06-05 16:33:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:33:48,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:48,422 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 16:33:48,422 INFO L226 Difference]: Without dead ends: 2352 [2021-06-05 16:33:48,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1576.1ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:33:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2352 states. [2021-06-05 16:33:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2352 to 1599. [2021-06-05 16:33:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.392991239048811) internal successors, (5422), 1598 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5422 transitions. [2021-06-05 16:33:48,445 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5422 transitions. Word has length 26 [2021-06-05 16:33:48,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:48,445 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5422 transitions. [2021-06-05 16:33:48,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5422 transitions. [2021-06-05 16:33:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:48,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:48,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:48,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1377,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:48,648 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-06-05 16:33:48,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:48,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396091958] [2021-06-05 16:33:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:49,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396091958] [2021-06-05 16:33:49,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396091958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:49,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104079990] [2021-06-05 16:33:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:49,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:33:49,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:49,460 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:33:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:49,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:33:49,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:49,644 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:49,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:33:49,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:49,992 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 16:33:49,992 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-06-05 16:33:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:50,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,020 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:50,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:50,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,162 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:33:50,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,175 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:50,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:33:50,177 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:33:50,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,319 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:33:50,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:33:50,335 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,345 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:50,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:33:50,346 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,459 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:33:50,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:33:50,476 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:50,485 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:33:50,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:33:50,486 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:50,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:50,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:33:50,591 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:391, output treesize:170 [2021-06-05 16:33:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:50,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104079990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:50,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:50,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:33:50,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303160962] [2021-06-05 16:33:50,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:33:50,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:50,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:33:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:33:50,734 INFO L87 Difference]: Start difference. First operand 1599 states and 5422 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:51,694 INFO L93 Difference]: Finished difference Result 2115 states and 7008 transitions. [2021-06-05 16:33:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:33:51,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:51,697 INFO L225 Difference]: With dead ends: 2115 [2021-06-05 16:33:51,697 INFO L226 Difference]: Without dead ends: 2090 [2021-06-05 16:33:51,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1344.1ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:33:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-06-05 16:33:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1599. [2021-06-05 16:33:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.392991239048811) internal successors, (5422), 1598 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5422 transitions. [2021-06-05 16:33:51,717 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5422 transitions. Word has length 26 [2021-06-05 16:33:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:51,717 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5422 transitions. [2021-06-05 16:33:51,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5422 transitions. [2021-06-05 16:33:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:51,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:51,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:51,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1406,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:51,919 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-05 16:33:51,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:51,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426150196] [2021-06-05 16:33:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:52,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:52,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426150196] [2021-06-05 16:33:52,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426150196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:52,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203622153] [2021-06-05 16:33:52,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:52,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:52,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:33:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:52,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:52,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:33:52,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:33:52,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:33:52,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:33:52,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:33:52,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:52,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:33:52,797 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:33:52,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:33:52,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:33:52,823 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:52,830 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:33:52,837 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:52,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:52,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:33:52,840 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:52,860 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:33:52,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:33:52,861 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:33:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203622153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:52,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:52,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:33:52,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90622266] [2021-06-05 16:33:52,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:33:52,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:33:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:33:52,884 INFO L87 Difference]: Start difference. First operand 1599 states and 5422 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:54,163 INFO L93 Difference]: Finished difference Result 2060 states and 6796 transitions. [2021-06-05 16:33:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:33:54,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:54,166 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 16:33:54,166 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 16:33:54,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1372.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:33:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 16:33:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1603. [2021-06-05 16:33:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3907615480649187) internal successors, (5432), 1602 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5432 transitions. [2021-06-05 16:33:54,185 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5432 transitions. Word has length 26 [2021-06-05 16:33:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:54,185 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5432 transitions. [2021-06-05 16:33:54,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5432 transitions. [2021-06-05 16:33:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:54,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:54,187 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:54,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-06-05 16:33:54,388 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-05 16:33:54,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:54,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631306829] [2021-06-05 16:33:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:54,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:54,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631306829] [2021-06-05 16:33:54,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631306829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:54,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793502055] [2021-06-05 16:33:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:33:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:55,098 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_92, v_prenex_96], 5=[v_prenex_94, A]} [2021-06-05 16:33:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:55,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:33:55,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:55,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-06-05 16:33:55,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,204 INFO L628 ElimStorePlain]: treesize reduction 133, result has 45.9 percent of original size [2021-06-05 16:33:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:33:55,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:55,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:55,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:33:55,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:55,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:33:55,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:33:55,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:33:55,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:55,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:55,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:33:55,300 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-06-05 16:33:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:55,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793502055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:55,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:33:55,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:33:55,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207583055] [2021-06-05 16:33:55,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:33:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:33:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:33:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:33:55,337 INFO L87 Difference]: Start difference. First operand 1603 states and 5432 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:33:56,744 INFO L93 Difference]: Finished difference Result 2261 states and 7446 transitions. [2021-06-05 16:33:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:33:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:33:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:33:56,751 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 16:33:56,751 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 16:33:56,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1533.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1451, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:33:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 16:33:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1603. [2021-06-05 16:33:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.3907615480649187) internal successors, (5432), 1602 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5432 transitions. [2021-06-05 16:33:56,780 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5432 transitions. Word has length 26 [2021-06-05 16:33:56,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:33:56,780 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5432 transitions. [2021-06-05 16:33:56,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:33:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5432 transitions. [2021-06-05 16:33:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:33:56,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:33:56,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:33:56,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1533 [2021-06-05 16:33:56,993 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:33:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:33:56,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-06-05 16:33:56,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:33:56,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737676191] [2021-06-05 16:33:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:33:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:33:57,280 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-06-05 16:33:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:33:57,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:33:57,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737676191] [2021-06-05 16:33:57,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737676191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:33:57,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642811297] [2021-06-05 16:33:57,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:33:57,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:33:57,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:33:57,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:33:57,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:33:57,760 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 16:33:58,287 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:33:58,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,640 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2021-06-05 16:33:58,641 INFO L628 ElimStorePlain]: treesize reduction 126, result has 75.9 percent of original size [2021-06-05 16:33:58,662 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:33:58,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,825 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:33:58,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:58,844 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:58,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:33:58,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:58,997 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:33:58,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,016 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:33:59,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:33:59,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,161 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:33:59,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:33:59,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,318 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:33:59,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:59,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,349 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:59,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:33:59,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,593 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 99 [2021-06-05 16:33:59,593 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.4 percent of original size [2021-06-05 16:33:59,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:33:59,614 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,624 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:33:59,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:33:59,625 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,743 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:33:59,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,762 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:33:59,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:33:59,764 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:33:59,867 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:33:59,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:33:59,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:33:59,880 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:539, output treesize:402 [2021-06-05 16:34:00,093 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 16:34:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:00,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642811297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:00,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:00,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969758915] [2021-06-05 16:34:00,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:00,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:00,189 INFO L87 Difference]: Start difference. First operand 1603 states and 5432 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:00,950 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-06-05 16:34:01,080 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-06-05 16:34:01,539 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 16:34:01,701 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-06-05 16:34:01,931 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-06-05 16:34:02,192 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:34:02,366 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 16:34:02,700 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-06-05 16:34:03,036 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-05 16:34:03,412 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2021-06-05 16:34:03,812 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2021-06-05 16:34:04,369 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-06-05 16:34:04,597 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 16:34:05,194 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2021-06-05 16:34:05,567 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-06-05 16:34:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:05,779 INFO L93 Difference]: Finished difference Result 2594 states and 8222 transitions. [2021-06-05 16:34:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:34:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:05,782 INFO L225 Difference]: With dead ends: 2594 [2021-06-05 16:34:05,783 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 16:34:05,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 5835.7ms TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:34:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 16:34:05,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1635. [2021-06-05 16:34:05,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.401468788249694) internal successors, (5558), 1634 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5558 transitions. [2021-06-05 16:34:05,808 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5558 transitions. Word has length 26 [2021-06-05 16:34:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:05,808 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5558 transitions. [2021-06-05 16:34:05,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5558 transitions. [2021-06-05 16:34:05,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:05,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:05,811 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:06,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:06,025 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-05 16:34:06,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:06,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152435123] [2021-06-05 16:34:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:06,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:06,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152435123] [2021-06-05 16:34:06,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152435123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:06,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490391130] [2021-06-05 16:34:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:06,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:06,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 16:34:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 45 [2021-06-05 16:34:07,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,114 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:34:07,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 16:34:07,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,134 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:34:07,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,154 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:34:07,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,180 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 16:34:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 26 [2021-06-05 16:34:07,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:07,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 16:34:07,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,234 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:34:07,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:34:07,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,262 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:34:07,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:34:07,265 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,281 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:34:07,282 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,297 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:34:07,298 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,313 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:34:07,314 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,329 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:34:07,330 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,343 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:34:07,344 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,361 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:34:07,361 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,375 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:34:07,375 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:07,384 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:34:07,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:34:07,385 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:07,463 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.4 percent of original size [2021-06-05 16:34:07,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:34:07,465 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:71 [2021-06-05 16:34:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:07,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490391130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:07,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:07,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 16:34:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472970774] [2021-06-05 16:34:07,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:34:07,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:07,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:34:07,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:34:07,546 INFO L87 Difference]: Start difference. First operand 1635 states and 5558 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:09,991 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 16:34:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:10,709 INFO L93 Difference]: Finished difference Result 2662 states and 8486 transitions. [2021-06-05 16:34:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:34:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:10,713 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 16:34:10,713 INFO L226 Difference]: Without dead ends: 2618 [2021-06-05 16:34:10,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 3068.1ms TimeCoverageRelationStatistics Valid=692, Invalid=3598, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:34:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-06-05 16:34:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 1642. [2021-06-05 16:34:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 3.4021937842778796) internal successors, (5583), 1641 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 5583 transitions. [2021-06-05 16:34:10,736 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 5583 transitions. Word has length 26 [2021-06-05 16:34:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:10,737 INFO L482 AbstractCegarLoop]: Abstraction has 1642 states and 5583 transitions. [2021-06-05 16:34:10,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 5583 transitions. [2021-06-05 16:34:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:10,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:10,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:10,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1625 [2021-06-05 16:34:10,939 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-05 16:34:10,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:10,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205679041] [2021-06-05 16:34:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:11,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:11,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205679041] [2021-06-05 16:34:11,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205679041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:11,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713931814] [2021-06-05 16:34:11,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:11,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:34:11,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:34:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:11,870 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:34:11,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:34:11,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:11,937 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-05 16:34:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 34 [2021-06-05 16:34:11,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:11,970 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:34:11,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 30 [2021-06-05 16:34:11,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,002 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:34:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 30 [2021-06-05 16:34:12,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,036 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 16:34:12,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 30 [2021-06-05 16:34:12,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,055 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:34:12,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:34:12,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,110 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:34:12,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 16:34:12,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,167 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:34:12,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 16:34:12,176 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,219 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:34:12,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 16:34:12,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,249 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:34:12,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:34:12,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,267 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:34:12,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:34:12,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,284 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:34:12,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:34:12,285 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,318 INFO L354 Elim1Store]: treesize reduction 26, result has 36.6 percent of original size [2021-06-05 16:34:12,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 33 [2021-06-05 16:34:12,319 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,357 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:34:12,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 16:34:12,363 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,378 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:34:12,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:34:12,379 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,408 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:34:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 16:34:12,416 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:12,689 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-05 16:34:12,689 INFO L628 ElimStorePlain]: treesize reduction 92, result has 77.5 percent of original size [2021-06-05 16:34:12,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 16:34:12,695 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:358 [2021-06-05 16:34:12,925 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 16:34:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:13,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713931814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:13,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:13,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 16:34:13,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876306226] [2021-06-05 16:34:13,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:34:13,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:13,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:34:13,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:34:13,035 INFO L87 Difference]: Start difference. First operand 1642 states and 5583 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:15,528 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-06-05 16:34:15,667 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:34:15,954 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-05 16:34:16,124 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-06-05 16:34:16,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:16,323 INFO L93 Difference]: Finished difference Result 3238 states and 10236 transitions. [2021-06-05 16:34:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:34:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:16,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:16,327 INFO L225 Difference]: With dead ends: 3238 [2021-06-05 16:34:16,327 INFO L226 Difference]: Without dead ends: 3208 [2021-06-05 16:34:16,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3257.4ms TimeCoverageRelationStatistics Valid=689, Invalid=3733, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:34:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2021-06-05 16:34:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 1691. [2021-06-05 16:34:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.4005917159763315) internal successors, (5747), 1690 states have internal predecessors, (5747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5747 transitions. [2021-06-05 16:34:16,356 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5747 transitions. Word has length 26 [2021-06-05 16:34:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:16,356 INFO L482 AbstractCegarLoop]: Abstraction has 1691 states and 5747 transitions. [2021-06-05 16:34:16,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5747 transitions. [2021-06-05 16:34:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:16,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:16,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:16,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:16,559 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:16,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-06-05 16:34:16,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:16,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915953195] [2021-06-05 16:34:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:16,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915953195] [2021-06-05 16:34:16,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915953195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:16,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850767436] [2021-06-05 16:34:16,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:16,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:16,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:17,214 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:34:17,425 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_134, v_prenex_135]} [2021-06-05 16:34:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:17,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:34:17,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:17,533 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 16:34:17,533 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 16:34:17,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:17,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:17,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:34:17,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:17,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:17,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:34:17,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:17,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:17,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:34:17,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-05 16:34:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850767436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:17,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:17,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620912934] [2021-06-05 16:34:17,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:17,622 INFO L87 Difference]: Start difference. First operand 1691 states and 5747 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:18,518 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:34:18,646 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 16:34:18,845 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 16:34:19,056 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2021-06-05 16:34:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:19,282 INFO L93 Difference]: Finished difference Result 2561 states and 8224 transitions. [2021-06-05 16:34:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:34:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:19,286 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 16:34:19,286 INFO L226 Difference]: Without dead ends: 2516 [2021-06-05 16:34:19,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1875.0ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:34:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-06-05 16:34:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1720. [2021-06-05 16:34:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.414194299011053) internal successors, (5869), 1719 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5869 transitions. [2021-06-05 16:34:19,308 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5869 transitions. Word has length 26 [2021-06-05 16:34:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:19,308 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 5869 transitions. [2021-06-05 16:34:19,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5869 transitions. [2021-06-05 16:34:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:19,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:19,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:19,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-06-05 16:34:19,511 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-06-05 16:34:19,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:19,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517137789] [2021-06-05 16:34:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:19,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:19,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517137789] [2021-06-05 16:34:19,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517137789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:19,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714800699] [2021-06-05 16:34:19,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:19,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:34:19,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:34:19,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:20,308 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:34:20,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:20,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:34:20,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,938 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 122 [2021-06-05 16:34:20,939 INFO L628 ElimStorePlain]: treesize reduction 130, result has 76.3 percent of original size [2021-06-05 16:34:20,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:20,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:34:20,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:20,973 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:20,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:20,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,252 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 119 [2021-06-05 16:34:21,252 INFO L628 ElimStorePlain]: treesize reduction 23, result has 94.1 percent of original size [2021-06-05 16:34:21,273 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:34:21,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,287 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:21,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:34:21,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,409 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 16:34:21,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,430 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:21,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:34:21,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,545 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 16:34:21,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,562 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:21,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:34:21,564 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,674 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:34:21,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,696 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:21,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:34:21,697 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,808 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:34:21,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,826 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:21,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:34:21,828 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:21,936 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:34:21,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:21,954 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:21,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:34:21,958 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:22,061 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:34:22,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:22,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:22,074 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:350 [2021-06-05 16:34:22,212 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-05 16:34:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:22,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714800699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:22,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:22,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:34:22,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403936176] [2021-06-05 16:34:22,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:22,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:22,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:22,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:22,370 INFO L87 Difference]: Start difference. First operand 1720 states and 5869 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:23,550 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-05 16:34:23,682 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-06-05 16:34:24,182 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 16:34:24,373 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 16:34:24,745 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 16:34:25,125 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-05 16:34:25,315 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:34:25,716 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-05 16:34:26,288 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 89 [2021-06-05 16:34:26,757 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2021-06-05 16:34:27,268 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2021-06-05 16:34:27,857 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2021-06-05 16:34:28,560 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 101 [2021-06-05 16:34:29,137 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 88 [2021-06-05 16:34:29,924 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 100 [2021-06-05 16:34:30,082 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-06-05 16:34:30,675 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2021-06-05 16:34:31,325 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 95 [2021-06-05 16:34:31,724 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-06-05 16:34:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:31,806 INFO L93 Difference]: Finished difference Result 3224 states and 10085 transitions. [2021-06-05 16:34:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:34:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:31,811 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 16:34:31,811 INFO L226 Difference]: Without dead ends: 3167 [2021-06-05 16:34:31,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 9413.9ms TimeCoverageRelationStatistics Valid=578, Invalid=2614, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:34:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3167 states. [2021-06-05 16:34:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3167 to 1704. [2021-06-05 16:34:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 3.405754550792719) internal successors, (5800), 1703 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 5800 transitions. [2021-06-05 16:34:31,836 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 5800 transitions. Word has length 26 [2021-06-05 16:34:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:31,837 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 5800 transitions. [2021-06-05 16:34:31,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 5800 transitions. [2021-06-05 16:34:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:31,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:31,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:32,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1875 [2021-06-05 16:34:32,041 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:32,041 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-05 16:34:32,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:32,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116529082] [2021-06-05 16:34:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:32,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116529082] [2021-06-05 16:34:32,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116529082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:32,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431334367] [2021-06-05 16:34:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:32,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:34:32,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:34:32,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:34:32,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:34:32,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:34:32,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:34:32,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:34:32,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:34:32,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:32,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:34:32,965 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:34:32,974 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:34:32,984 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:34:32,993 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:32,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:32,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:34:33,002 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:33,010 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:33,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:34:33,015 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:33,037 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:34:33,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:34:33,038 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:34:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431334367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:33,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:33,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:34:33,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346593512] [2021-06-05 16:34:33,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:33,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:33,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:33,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:33,071 INFO L87 Difference]: Start difference. First operand 1704 states and 5800 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:34,773 INFO L93 Difference]: Finished difference Result 3325 states and 10680 transitions. [2021-06-05 16:34:34,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:34:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:34,788 INFO L225 Difference]: With dead ends: 3325 [2021-06-05 16:34:34,788 INFO L226 Difference]: Without dead ends: 3289 [2021-06-05 16:34:34,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1697.3ms TimeCoverageRelationStatistics Valid=497, Invalid=2259, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:34:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-06-05 16:34:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 1811. [2021-06-05 16:34:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.422099447513812) internal successors, (6194), 1810 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6194 transitions. [2021-06-05 16:34:34,817 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6194 transitions. Word has length 26 [2021-06-05 16:34:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:34,817 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6194 transitions. [2021-06-05 16:34:34,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6194 transitions. [2021-06-05 16:34:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:34,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:34,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:35,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1911,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:35,042 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-05 16:34:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:35,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183123768] [2021-06-05 16:34:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:35,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:35,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183123768] [2021-06-05 16:34:35,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183123768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:35,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537100032] [2021-06-05 16:34:35,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:35,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:34:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,729 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:34:35,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:34:35,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,748 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:34:35,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,764 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:34:35,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,779 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:34:35,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,803 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:34:35,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 16:34:35,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,838 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:34:35,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:34:35,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,864 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:34:35,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:35,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:34:35,894 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,922 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:34:35,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,951 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:34:35,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-05 16:34:35,954 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,973 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:34:35,974 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:35,994 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:35,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:34:35,995 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,013 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:36,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:34:36,014 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,032 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:36,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:34:36,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:36,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,061 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 16:34:36,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-06-05 16:34:36,063 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:36,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:36,074 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:34:36,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:34:36,075 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:36,178 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-06-05 16:34:36,178 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-06-05 16:34:36,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:34:36,180 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 16:34:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:36,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537100032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:36,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:36,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 16:34:36,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583586627] [2021-06-05 16:34:36,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:36,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:36,258 INFO L87 Difference]: Start difference. First operand 1811 states and 6194 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:38,674 INFO L93 Difference]: Finished difference Result 3806 states and 12114 transitions. [2021-06-05 16:34:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:34:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:38,680 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 16:34:38,680 INFO L226 Difference]: Without dead ends: 3749 [2021-06-05 16:34:38,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2194.0ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:34:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2021-06-05 16:34:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 1846. [2021-06-05 16:34:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.430894308943089) internal successors, (6330), 1845 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6330 transitions. [2021-06-05 16:34:38,711 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6330 transitions. Word has length 26 [2021-06-05 16:34:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:38,711 INFO L482 AbstractCegarLoop]: Abstraction has 1846 states and 6330 transitions. [2021-06-05 16:34:38,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6330 transitions. [2021-06-05 16:34:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:38,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:38,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:38,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-06-05 16:34:38,914 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 27 times [2021-06-05 16:34:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:38,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816329302] [2021-06-05 16:34:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:39,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:39,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816329302] [2021-06-05 16:34:39,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816329302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:39,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372733711] [2021-06-05 16:34:39,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:39,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:34:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:34:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:39,818 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:34:40,050 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:34:40,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:34:40,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,248 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:40,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:34:40,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,567 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 126 [2021-06-05 16:34:40,568 INFO L628 ElimStorePlain]: treesize reduction 120, result has 76.0 percent of original size [2021-06-05 16:34:40,591 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:40,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:34:40,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,740 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 16:34:40,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,761 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:40,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 16:34:40,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:40,904 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:34:40,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:40,923 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:34:40,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,070 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:34:41,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:34:41,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,102 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:34:41,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:41,103 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,344 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-06-05 16:34:41,344 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.7 percent of original size [2021-06-05 16:34:41,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:34:41,366 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,487 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:34:41,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,503 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:34:41,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:34:41,505 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,611 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:34:41,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,629 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:34:41,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:34:41,632 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:41,735 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 16:34:41,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:41,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:41,747 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:347 [2021-06-05 16:34:41,910 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-06-05 16:34:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:41,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372733711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:41,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:41,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:34:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529389775] [2021-06-05 16:34:41,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:41,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:41,969 INFO L87 Difference]: Start difference. First operand 1846 states and 6330 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:43,162 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-05 16:34:43,385 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:34:43,590 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 16:34:43,864 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 16:34:44,374 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 121 [2021-06-05 16:34:44,791 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-05 16:34:45,383 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 113 [2021-06-05 16:34:46,064 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 139 [2021-06-05 16:34:46,638 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 116 [2021-06-05 16:34:46,900 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 79 [2021-06-05 16:34:47,837 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 133 [2021-06-05 16:34:48,283 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 81 [2021-06-05 16:34:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:48,564 INFO L93 Difference]: Finished difference Result 2649 states and 8646 transitions. [2021-06-05 16:34:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:34:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:48,567 INFO L225 Difference]: With dead ends: 2649 [2021-06-05 16:34:48,567 INFO L226 Difference]: Without dead ends: 2604 [2021-06-05 16:34:48,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 6568.9ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:34:48,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2021-06-05 16:34:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 1868. [2021-06-05 16:34:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.430637386181039) internal successors, (6405), 1867 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6405 transitions. [2021-06-05 16:34:48,590 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6405 transitions. Word has length 26 [2021-06-05 16:34:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:48,590 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 6405 transitions. [2021-06-05 16:34:48,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6405 transitions. [2021-06-05 16:34:48,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:48,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:48,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:48,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-06-05 16:34:48,792 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 28 times [2021-06-05 16:34:48,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:48,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315480927] [2021-06-05 16:34:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:49,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:49,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315480927] [2021-06-05 16:34:49,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315480927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:49,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667090558] [2021-06-05 16:34:49,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:49,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:34:49,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:34:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:49,441 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 16:34:49,553 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_174, v_prenex_175, v_prenex_176, v_prenex_177], 3=[A]} [2021-06-05 16:34:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:49,569 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:49,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:34:49,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:49,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:49,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:34:49,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:49,899 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-05 16:34:49,900 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-06-05 16:34:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:49,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:34:49,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:49,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:49,927 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:49,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:34:49,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,087 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:34:50,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,101 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:34:50,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:34:50,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,240 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:34:50,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:34:50,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,268 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:50,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:34:50,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,383 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 16:34:50,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 16:34:50,399 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:50,408 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:34:50,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 16:34:50,409 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:50,511 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:34:50,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:50,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:34:50,517 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:185 [2021-06-05 16:34:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667090558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:50,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:50,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:34:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037252998] [2021-06-05 16:34:50,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:34:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:34:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:34:50,650 INFO L87 Difference]: Start difference. First operand 1868 states and 6405 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:51,847 INFO L93 Difference]: Finished difference Result 2435 states and 8167 transitions. [2021-06-05 16:34:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:34:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:51,850 INFO L225 Difference]: With dead ends: 2435 [2021-06-05 16:34:51,850 INFO L226 Difference]: Without dead ends: 2410 [2021-06-05 16:34:51,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1433.1ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:34:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-06-05 16:34:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1870. [2021-06-05 16:34:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.42964151952916) internal successors, (6410), 1869 states have internal predecessors, (6410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6410 transitions. [2021-06-05 16:34:51,872 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6410 transitions. Word has length 26 [2021-06-05 16:34:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:51,872 INFO L482 AbstractCegarLoop]: Abstraction has 1870 states and 6410 transitions. [2021-06-05 16:34:51,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6410 transitions. [2021-06-05 16:34:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:51,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:51,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:52,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2143,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:52,075 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash 654380625, now seen corresponding path program 29 times [2021-06-05 16:34:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:52,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023968612] [2021-06-05 16:34:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:52,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023968612] [2021-06-05 16:34:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023968612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109596628] [2021-06-05 16:34:52,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:52,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:34:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:34:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:52,963 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:34:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:53,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:34:53,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:53,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 16:34:53,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,440 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 125 [2021-06-05 16:34:53,441 INFO L628 ElimStorePlain]: treesize reduction 72, result has 84.8 percent of original size [2021-06-05 16:34:53,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:53,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:34:53,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:53,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:53,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,745 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 117 [2021-06-05 16:34:53,746 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.2 percent of original size [2021-06-05 16:34:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,759 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:53,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:34:53,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:53,890 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:34:53,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:53,902 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:53,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:34:53,904 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,029 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:34:54,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:34:54,045 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,164 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:34:54,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,176 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:34:54,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:34:54,177 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,292 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 16:34:54,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:34:54,306 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,416 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-05 16:34:54,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:34:54,432 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:54,441 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:34:54,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:34:54,442 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:54,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:34:54,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:34:54,534 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:156 [2021-06-05 16:34:54,685 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 16:34:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:54,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109596628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:54,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:54,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:34:54,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173297913] [2021-06-05 16:34:54,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:34:54,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:34:54,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:34:54,726 INFO L87 Difference]: Start difference. First operand 1870 states and 6410 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:55,641 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-05 16:34:56,043 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 16:34:56,307 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 16:34:56,518 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 16:34:56,754 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 16:34:56,978 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:34:57,118 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-05 16:34:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:57,198 INFO L93 Difference]: Finished difference Result 2744 states and 8990 transitions. [2021-06-05 16:34:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:34:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:34:57,202 INFO L225 Difference]: With dead ends: 2744 [2021-06-05 16:34:57,202 INFO L226 Difference]: Without dead ends: 2710 [2021-06-05 16:34:57,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2844.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:34:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-06-05 16:34:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 1870. [2021-06-05 16:34:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.4307116104868913) internal successors, (6412), 1869 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6412 transitions. [2021-06-05 16:34:57,230 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6412 transitions. Word has length 26 [2021-06-05 16:34:57,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:34:57,230 INFO L482 AbstractCegarLoop]: Abstraction has 1870 states and 6412 transitions. [2021-06-05 16:34:57,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6412 transitions. [2021-06-05 16:34:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:34:57,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:34:57,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:34:57,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:57,433 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:34:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:34:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-06-05 16:34:57,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:34:57,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311789181] [2021-06-05 16:34:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:34:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:34:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:57,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:34:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311789181] [2021-06-05 16:34:57,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311789181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:57,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688224743] [2021-06-05 16:34:57,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:34:57,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:34:57,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:34:57,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:34:57,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:34:58,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:34:58,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:34:58,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:34:58,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:34:58,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:58,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:34:58,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:34:58,323 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:34:58,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:34:58,342 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:34:58,352 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:34:58,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:34:58,370 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:34:58,377 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:34:58,384 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:34:58,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:34:58,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:34:58,389 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:34:58,408 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:34:58,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:34:58,410 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:34:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:34:58,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688224743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:34:58,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:34:58,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:34:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557558088] [2021-06-05 16:34:58,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:34:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:34:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:34:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:34:58,438 INFO L87 Difference]: Start difference. First operand 1870 states and 6412 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:34:59,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:34:59,997 INFO L93 Difference]: Finished difference Result 2342 states and 7805 transitions. [2021-06-05 16:34:59,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:34:59,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:34:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:00,000 INFO L225 Difference]: With dead ends: 2342 [2021-06-05 16:35:00,000 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 16:35:00,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1647.4ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:35:00,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 16:35:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1866. [2021-06-05 16:35:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.429490616621984) internal successors, (6396), 1865 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6396 transitions. [2021-06-05 16:35:00,022 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6396 transitions. Word has length 26 [2021-06-05 16:35:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:00,022 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6396 transitions. [2021-06-05 16:35:00,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6396 transitions. [2021-06-05 16:35:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:00,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:00,024 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:00,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2207 [2021-06-05 16:35:00,225 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:00,225 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-05 16:35:00,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:00,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114546453] [2021-06-05 16:35:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:00,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:00,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114546453] [2021-06-05 16:35:00,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114546453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:00,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265056788] [2021-06-05 16:35:00,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:00,914 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_196], 5=[v_prenex_198, v_prenex_200]} [2021-06-05 16:35:00,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:00,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:00,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:35:00,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:00,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:00,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:00,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:00,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:35:00,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,014 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-06-05 16:35:01,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-05 16:35:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:35:01,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:01,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:01,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:35:01,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:01,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:01,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:35:01,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-06-05 16:35:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265056788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:01,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:01,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:35:01,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766986380] [2021-06-05 16:35:01,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:35:01,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:01,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:35:01,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:35:01,107 INFO L87 Difference]: Start difference. First operand 1866 states and 6396 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:02,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:02,519 INFO L93 Difference]: Finished difference Result 2566 states and 8529 transitions. [2021-06-05 16:35:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:35:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:02,523 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 16:35:02,523 INFO L226 Difference]: Without dead ends: 2551 [2021-06-05 16:35:02,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1490.9ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:35:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-06-05 16:35:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 1866. [2021-06-05 16:35:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.429490616621984) internal successors, (6396), 1865 states have internal predecessors, (6396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:02,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6396 transitions. [2021-06-05 16:35:02,546 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6396 transitions. Word has length 26 [2021-06-05 16:35:02,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:02,546 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6396 transitions. [2021-06-05 16:35:02,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6396 transitions. [2021-06-05 16:35:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:02,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:02,549 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:02,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2303 [2021-06-05 16:35:02,749 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:02,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-06-05 16:35:02,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:02,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442726529] [2021-06-05 16:35:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:03,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442726529] [2021-06-05 16:35:03,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442726529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:03,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899465446] [2021-06-05 16:35:03,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:03,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,388 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:35:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 16:35:03,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,425 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:35:03,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 16:35:03,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,458 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:35:03,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 16:35:03,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,480 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:35:03,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:35:03,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,515 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:35:03,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-05 16:35:03,519 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,552 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:35:03,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 16:35:03,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,586 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:35:03,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-06-05 16:35:03,588 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,609 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:35:03,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:35:03,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,633 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:35:03,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:35:03,634 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,667 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:35:03,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-06-05 16:35:03,669 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,702 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:35:03,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-06-05 16:35:03,703 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,725 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:35:03,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:35:03,726 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,746 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:35:03,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:35:03,747 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 16:35:03,789 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,819 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:35:03,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 16:35:03,821 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:03,833 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:35:03,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:35:03,834 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:03,939 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-06-05 16:35:03,939 INFO L628 ElimStorePlain]: treesize reduction 109, result has 41.7 percent of original size [2021-06-05 16:35:03,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:35:03,940 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:78 [2021-06-05 16:35:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:04,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899465446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:04,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:04,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 16:35:04,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598484107] [2021-06-05 16:35:04,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:35:04,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:04,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:35:04,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:04,022 INFO L87 Difference]: Start difference. First operand 1866 states and 6396 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:05,125 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-05 16:35:05,816 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 16:35:06,120 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-06-05 16:35:06,824 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2021-06-05 16:35:08,413 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 16:35:09,102 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 16:35:09,368 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-05 16:35:09,766 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-06-05 16:35:10,224 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 16:35:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:10,730 INFO L93 Difference]: Finished difference Result 3357 states and 10803 transitions. [2021-06-05 16:35:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 16:35:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:10,734 INFO L225 Difference]: With dead ends: 3357 [2021-06-05 16:35:10,734 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 16:35:10,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 5879.0ms TimeCoverageRelationStatistics Valid=1266, Invalid=7106, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 16:35:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 16:35:10,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1970. [2021-06-05 16:35:10,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.420518029456577) internal successors, (6735), 1969 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 6735 transitions. [2021-06-05 16:35:10,763 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 6735 transitions. Word has length 26 [2021-06-05 16:35:10,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:10,763 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 6735 transitions. [2021-06-05 16:35:10,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 6735 transitions. [2021-06-05 16:35:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:10,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:10,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:10,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2317,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:10,968 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-05 16:35:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:10,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906824587] [2021-06-05 16:35:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:11,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:11,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906824587] [2021-06-05 16:35:11,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906824587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:11,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534310491] [2021-06-05 16:35:11,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:11,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:35:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:11,824 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-05 16:35:12,061 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_206, v_prenex_208, v_prenex_210, v_prenex_212, v_prenex_202, v_prenex_214], 6=[A, v_prenex_204]} [2021-06-05 16:35:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:12,114 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-05 16:35:12,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 32 [2021-06-05 16:35:12,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:12,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:12,170 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-06-05 16:35:12,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 39 [2021-06-05 16:35:12,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:12,643 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 16:35:12,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:12,691 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:35:12,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 43 [2021-06-05 16:35:12,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:12,731 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-06-05 16:35:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 36 [2021-06-05 16:35:12,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,123 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 16:35:13,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:13,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,165 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-06-05 16:35:13,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 34 [2021-06-05 16:35:13,169 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,216 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-05 16:35:13,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 16:35:13,220 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,640 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 16:35:13,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:13,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,688 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:35:13,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 43 [2021-06-05 16:35:13,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:13,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:13,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:13,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 55 [2021-06-05 16:35:13,733 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:14,846 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 161 DAG size of output: 150 [2021-06-05 16:35:14,847 INFO L628 ElimStorePlain]: treesize reduction 72, result has 90.2 percent of original size [2021-06-05 16:35:14,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:14,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 16:35:14,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:14,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:14,937 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:35:14,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 43 [2021-06-05 16:35:14,942 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:15,637 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 147 [2021-06-05 16:35:15,638 INFO L628 ElimStorePlain]: treesize reduction 34, result has 94.9 percent of original size [2021-06-05 16:35:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:15,743 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-06-05 16:35:15,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:35:15,747 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:15,781 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-06-05 16:35:15,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 28 [2021-06-05 16:35:15,783 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:16,102 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:35:16,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:16,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,141 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:35:16,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-06-05 16:35:16,146 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,162 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:35:16,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:35:16,163 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:16,428 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:35:16,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:16,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,466 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-06-05 16:35:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-06-05 16:35:16,470 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:16,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:16,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 16:35:16,503 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:16,745 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 16:35:16,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:16,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-05 16:35:16,782 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:777 [2021-06-05 16:35:17,154 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2021-06-05 16:35:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534310491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:17,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:17,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:35:17,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915720354] [2021-06-05 16:35:17,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:35:17,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:17,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:35:17,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:35:17,312 INFO L87 Difference]: Start difference. First operand 1970 states and 6735 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:18,358 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-05 16:35:18,953 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 16:35:19,408 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 16:35:22,610 WARN L205 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-05 16:35:22,894 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-05 16:35:26,172 WARN L205 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 119 DAG size of output: 79 [2021-06-05 16:35:26,396 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-05 16:35:26,596 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-06-05 16:35:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:27,063 INFO L93 Difference]: Finished difference Result 3232 states and 10559 transitions. [2021-06-05 16:35:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:35:27,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:27,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:27,068 INFO L225 Difference]: With dead ends: 3232 [2021-06-05 16:35:27,068 INFO L226 Difference]: Without dead ends: 3187 [2021-06-05 16:35:27,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 10248.5ms TimeCoverageRelationStatistics Valid=609, Invalid=2931, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:35:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-06-05 16:35:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 2005. [2021-06-05 16:35:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4266467065868262) internal successors, (6867), 2004 states have internal predecessors, (6867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6867 transitions. [2021-06-05 16:35:27,098 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6867 transitions. Word has length 26 [2021-06-05 16:35:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:27,098 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 6867 transitions. [2021-06-05 16:35:27,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:27,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6867 transitions. [2021-06-05 16:35:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:27,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:27,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:27,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2346 [2021-06-05 16:35:27,301 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-05 16:35:27,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:27,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534247126] [2021-06-05 16:35:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:27,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:27,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534247126] [2021-06-05 16:35:27,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534247126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:27,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281222253] [2021-06-05 16:35:27,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:27,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:35:27,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:28,178 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_226], 5=[v_prenex_222, v_prenex_224]} [2021-06-05 16:35:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:28,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:35:28,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:28,293 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 16:35:28,293 INFO L628 ElimStorePlain]: treesize reduction 137, result has 41.9 percent of original size [2021-06-05 16:35:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:28,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:28,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:35:28,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:28,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:28,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:28,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:28,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:28,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:35:28,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:28,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:28,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:28,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:35:28,371 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:28,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:28,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:35:28,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:22 [2021-06-05 16:35:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:28,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281222253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:28,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:28,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:35:28,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510425450] [2021-06-05 16:35:28,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:35:28,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:28,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:35:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:35:28,430 INFO L87 Difference]: Start difference. First operand 2005 states and 6867 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:30,657 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 16:35:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:31,253 INFO L93 Difference]: Finished difference Result 2655 states and 8819 transitions. [2021-06-05 16:35:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:35:31,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:31,257 INFO L225 Difference]: With dead ends: 2655 [2021-06-05 16:35:31,257 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 16:35:31,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 2567.7ms TimeCoverageRelationStatistics Valid=482, Invalid=2170, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:35:31,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 16:35:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2003. [2021-06-05 16:35:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4265734265734267) internal successors, (6860), 2002 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6860 transitions. [2021-06-05 16:35:31,281 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6860 transitions. Word has length 26 [2021-06-05 16:35:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:31,281 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6860 transitions. [2021-06-05 16:35:31,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6860 transitions. [2021-06-05 16:35:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:31,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:31,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:31,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2431 [2021-06-05 16:35:31,484 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:31,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-05 16:35:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435167491] [2021-06-05 16:35:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:31,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:31,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435167491] [2021-06-05 16:35:31,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435167491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:31,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399936587] [2021-06-05 16:35:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:31,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:35:31,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:32,138 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:35:32,339 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 16:35:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:32,592 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:35:32,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 16:35:32,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:32,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:32,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:32,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:35:32,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:33,025 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 16:35:33,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,060 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:35:33,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 16:35:33,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,093 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:35:33,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:35:33,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:33,773 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-06-05 16:35:33,774 INFO L628 ElimStorePlain]: treesize reduction 29, result has 95.9 percent of original size [2021-06-05 16:35:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,812 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:35:33,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 16:35:33,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:33,843 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:35:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 16:35:33,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,160 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:35:34,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,194 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:35:34,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 16:35:34,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,246 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:35:34,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 16:35:34,250 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,530 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:35:34,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,567 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:35:34,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:35:34,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,592 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:35:34,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-05 16:35:34,594 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,864 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:35:34,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:34,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,901 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:35:34,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:35:34,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:34,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:34,927 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:35:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 16:35:34,929 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:35,191 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 16:35:35,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:35,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,222 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:35:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:35:35,224 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:35,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,250 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:35:35,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:35:35,255 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:35,723 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 104 [2021-06-05 16:35:35,723 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.8 percent of original size [2021-06-05 16:35:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:35,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 16:35:35,761 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:35,774 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:35:35,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:35:35,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:35,957 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:35:35,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:35,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 16:35:35,984 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:793, output treesize:352 [2021-06-05 16:35:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:36,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399936587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:36,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:36,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 16:35:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326822706] [2021-06-05 16:35:36,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:35:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:36,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:35:36,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:35:36,154 INFO L87 Difference]: Start difference. First operand 2003 states and 6860 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:40,267 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:35:41,094 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-05 16:35:41,927 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 115 [2021-06-05 16:35:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:42,484 INFO L93 Difference]: Finished difference Result 2890 states and 9570 transitions. [2021-06-05 16:35:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:35:42,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:42,488 INFO L225 Difference]: With dead ends: 2890 [2021-06-05 16:35:42,488 INFO L226 Difference]: Without dead ends: 2860 [2021-06-05 16:35:42,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 6516.9ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:35:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-06-05 16:35:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2003. [2021-06-05 16:35:42,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4265734265734267) internal successors, (6860), 2002 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6860 transitions. [2021-06-05 16:35:42,517 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6860 transitions. Word has length 26 [2021-06-05 16:35:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:42,517 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6860 transitions. [2021-06-05 16:35:42,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6860 transitions. [2021-06-05 16:35:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:42,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:42,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:42,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2445 [2021-06-05 16:35:42,720 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-05 16:35:42,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:42,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128487808] [2021-06-05 16:35:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:42,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:42,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128487808] [2021-06-05 16:35:42,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128487808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:42,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246014914] [2021-06-05 16:35:42,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:43,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:43,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:35:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:43,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 16:35:43,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,274 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:35:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-06-05 16:35:43,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,302 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:35:43,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 16:35:43,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,319 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:35:43,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,346 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:35:43,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:35:43,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,364 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:35:43,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,380 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:35:43,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,398 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:35:43,399 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,423 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:35:43,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:35:43,425 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,441 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:35:43,442 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,468 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:35:43,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:35:43,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,496 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:35:43,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:35:43,498 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,513 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:35:43,513 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,528 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:35:43,529 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,543 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:35:43,543 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:43,551 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:35:43,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:35:43,551 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:43,624 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-06-05 16:35:43,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:35:43,625 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:78 [2021-06-05 16:35:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:43,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246014914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:43,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:43,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:35:43,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272822447] [2021-06-05 16:35:43,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:35:43,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:43,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:35:43,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:35:43,713 INFO L87 Difference]: Start difference. First operand 2003 states and 6860 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:45,165 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 16:35:46,143 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 16:35:46,394 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-05 16:35:46,662 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 16:35:46,991 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-06-05 16:35:47,603 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-06-05 16:35:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:47,676 INFO L93 Difference]: Finished difference Result 3566 states and 11484 transitions. [2021-06-05 16:35:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:35:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:47,681 INFO L225 Difference]: With dead ends: 3566 [2021-06-05 16:35:47,681 INFO L226 Difference]: Without dead ends: 3532 [2021-06-05 16:35:47,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 3638.7ms TimeCoverageRelationStatistics Valid=879, Invalid=3153, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:35:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3532 states. [2021-06-05 16:35:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3532 to 2009. [2021-06-05 16:35:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.431772908366534) internal successors, (6891), 2008 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6891 transitions. [2021-06-05 16:35:47,713 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6891 transitions. Word has length 26 [2021-06-05 16:35:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:47,713 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 6891 transitions. [2021-06-05 16:35:47,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6891 transitions. [2021-06-05 16:35:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:47,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:47,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:47,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-06-05 16:35:47,917 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1556883255, now seen corresponding path program 30 times [2021-06-05 16:35:47,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:47,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927696200] [2021-06-05 16:35:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:48,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:48,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927696200] [2021-06-05 16:35:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927696200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:48,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766122020] [2021-06-05 16:35:48,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:48,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:35:48,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:48,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:35:48,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:48,477 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:35:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:35:48,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,489 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:48,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,500 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:48,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:48,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:35:48,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,540 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:35:48,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:35:48,541 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,559 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:35:48,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:35:48,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,571 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:48,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:48,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:35:48,592 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,602 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:48,603 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,612 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:48,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,630 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:35:48,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:35:48,632 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,642 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:35:48,642 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,666 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:35:48,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:35:48,669 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,678 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:48,678 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,686 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:48,687 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,692 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:35:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:48,693 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:48,822 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-06-05 16:35:48,822 INFO L628 ElimStorePlain]: treesize reduction 29, result has 83.9 percent of original size [2021-06-05 16:35:48,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:35:48,840 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-06-05 16:35:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:49,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766122020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:49,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:49,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 16:35:49,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327240695] [2021-06-05 16:35:49,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:35:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:35:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:35:49,023 INFO L87 Difference]: Start difference. First operand 2009 states and 6891 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:49,923 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 16:35:50,725 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-05 16:35:50,896 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 16:35:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:50,933 INFO L93 Difference]: Finished difference Result 2493 states and 8335 transitions. [2021-06-05 16:35:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:35:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:50,936 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 16:35:50,936 INFO L226 Difference]: Without dead ends: 2478 [2021-06-05 16:35:50,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1846.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:35:50,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-05 16:35:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2002. [2021-06-05 16:35:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4302848575712144) internal successors, (6864), 2001 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6864 transitions. [2021-06-05 16:35:50,964 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6864 transitions. Word has length 26 [2021-06-05 16:35:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:50,964 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 6864 transitions. [2021-06-05 16:35:50,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6864 transitions. [2021-06-05 16:35:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:50,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:50,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:51,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2538 [2021-06-05 16:35:51,189 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1386281111, now seen corresponding path program 31 times [2021-06-05 16:35:51,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:51,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81004495] [2021-06-05 16:35:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:51,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:51,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81004495] [2021-06-05 16:35:51,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81004495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:51,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288617591] [2021-06-05 16:35:51,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:51,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:51,739 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:35:51,973 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-05 16:35:52,033 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_249], 2=[A, v_prenex_250]} [2021-06-05 16:35:52,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:52,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,145 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 16:35:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:35:52,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:52,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:35:52,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,206 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.5 percent of original size [2021-06-05 16:35:52,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:52,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:52,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:35:52,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:52,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:52,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:35:52,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-06-05 16:35:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:52,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288617591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:52,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:52,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:35:52,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328035523] [2021-06-05 16:35:52,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:35:52,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:52,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:35:52,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:35:52,273 INFO L87 Difference]: Start difference. First operand 2002 states and 6864 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:53,343 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:35:53,679 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-05 16:35:53,863 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-05 16:35:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:54,102 INFO L93 Difference]: Finished difference Result 2918 states and 9622 transitions. [2021-06-05 16:35:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:35:54,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:54,107 INFO L225 Difference]: With dead ends: 2918 [2021-06-05 16:35:54,107 INFO L226 Difference]: Without dead ends: 2873 [2021-06-05 16:35:54,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1906.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:35:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-06-05 16:35:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2019. [2021-06-05 16:35:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.4345887016848367) internal successors, (6931), 2018 states have internal predecessors, (6931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 6931 transitions. [2021-06-05 16:35:54,140 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 6931 transitions. Word has length 26 [2021-06-05 16:35:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:54,140 INFO L482 AbstractCegarLoop]: Abstraction has 2019 states and 6931 transitions. [2021-06-05 16:35:54,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:54,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 6931 transitions. [2021-06-05 16:35:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:54,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:54,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:54,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2595 [2021-06-05 16:35:54,343 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:54,343 INFO L82 PathProgramCache]: Analyzing trace with hash -231251669, now seen corresponding path program 32 times [2021-06-05 16:35:54,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:54,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732197960] [2021-06-05 16:35:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:54,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:54,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732197960] [2021-06-05 16:35:54,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732197960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:54,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746346534] [2021-06-05 16:35:54,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:54,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:35:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:54,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:35:54,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:54,883 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 16:35:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:54,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:54,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:35:54,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:35:55,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:55,300 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2021-06-05 16:35:55,300 INFO L628 ElimStorePlain]: treesize reduction 131, result has 71.4 percent of original size [2021-06-05 16:35:55,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,314 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:55,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:35:55,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:55,439 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 16:35:55,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:35:55,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:55,580 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:35:55,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:35:55,599 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:55,708 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 16:35:55,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,720 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:35:55,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:55,826 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:35:55,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:35:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:35:55,841 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:55,943 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:35:55,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:55,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:35:55,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:56,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:56,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:56,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:35:56,067 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:56,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:56,076 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:35:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:35:56,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:56,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:35:56,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:35:56,155 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-06-05 16:35:56,282 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-06-05 16:35:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:56,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746346534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:56,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:56,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:35:56,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912318149] [2021-06-05 16:35:56,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:35:56,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:56,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:35:56,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:35:56,323 INFO L87 Difference]: Start difference. First operand 2019 states and 6931 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:57,266 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:35:57,431 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-05 16:35:57,780 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-05 16:35:58,068 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-06-05 16:35:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:58,220 INFO L93 Difference]: Finished difference Result 3134 states and 10334 transitions. [2021-06-05 16:35:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:35:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:58,225 INFO L225 Difference]: With dead ends: 3134 [2021-06-05 16:35:58,225 INFO L226 Difference]: Without dead ends: 3104 [2021-06-05 16:35:58,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 2073.0ms TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:35:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2021-06-05 16:35:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2002. [2021-06-05 16:35:58,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.4292853573213393) internal successors, (6862), 2001 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 6862 transitions. [2021-06-05 16:35:58,253 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 6862 transitions. Word has length 26 [2021-06-05 16:35:58,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:58,253 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 6862 transitions. [2021-06-05 16:35:58,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:58,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 6862 transitions. [2021-06-05 16:35:58,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:58,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:58,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:58,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2607 [2021-06-05 16:35:58,461 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-06-05 16:35:58,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:58,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204761482] [2021-06-05 16:35:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:35:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:58,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:35:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204761482] [2021-06-05 16:35:58,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204761482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580209402] [2021-06-05 16:35:58,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:35:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:35:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:35:58,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:35:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:35:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:35:59,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:35:59,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:59,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:59,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:59,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:35:59,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:59,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:59,106 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:59,112 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:35:59,119 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:59,126 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:35:59,133 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:35:59,139 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:35:59,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:35:59,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:35:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:35:59,149 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:35:59,170 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:35:59,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:35:59,172 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:35:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:35:59,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580209402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:35:59,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:35:59,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:35:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299982812] [2021-06-05 16:35:59,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:35:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:35:59,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:35:59,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:35:59,196 INFO L87 Difference]: Start difference. First operand 2002 states and 6862 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:35:59,719 INFO L93 Difference]: Finished difference Result 2504 states and 8391 transitions. [2021-06-05 16:35:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:35:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:35:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:35:59,723 INFO L225 Difference]: With dead ends: 2504 [2021-06-05 16:35:59,723 INFO L226 Difference]: Without dead ends: 2483 [2021-06-05 16:35:59,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 660.7ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:35:59,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2483 states. [2021-06-05 16:35:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2483 to 2009. [2021-06-05 16:35:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.431772908366534) internal successors, (6891), 2008 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 6891 transitions. [2021-06-05 16:35:59,746 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 6891 transitions. Word has length 26 [2021-06-05 16:35:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:35:59,747 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 6891 transitions. [2021-06-05 16:35:59,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:35:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 6891 transitions. [2021-06-05 16:35:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:35:59,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:35:59,750 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:35:59,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2635 [2021-06-05 16:35:59,955 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:35:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:35:59,955 INFO L82 PathProgramCache]: Analyzing trace with hash -881941653, now seen corresponding path program 34 times [2021-06-05 16:35:59,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:35:59,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079112673] [2021-06-05 16:35:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:35:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:00,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:00,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079112673] [2021-06-05 16:36:00,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079112673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:00,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564686110] [2021-06-05 16:36:00,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:00,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:00,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:36:00,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:36:00,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:00,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:00,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:36:00,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:00,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:36:00,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:00,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:00,550 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:00,556 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:00,562 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:00,569 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:00,575 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:00,581 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:00,587 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:00,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:00,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:00,591 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:00,612 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:36:00,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:00,613 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:36:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:00,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564686110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:00,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:00,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:36:00,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263072504] [2021-06-05 16:36:00,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:36:00,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:36:00,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:36:00,642 INFO L87 Difference]: Start difference. First operand 2009 states and 6891 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:01,018 INFO L93 Difference]: Finished difference Result 2352 states and 7913 transitions. [2021-06-05 16:36:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:36:01,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:01,021 INFO L225 Difference]: With dead ends: 2352 [2021-06-05 16:36:01,021 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 16:36:01,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 16:36:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2003. [2021-06-05 16:36:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2003 states, 2002 states have (on average 3.4315684315684316) internal successors, (6870), 2002 states have internal predecessors, (6870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 6870 transitions. [2021-06-05 16:36:01,049 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 6870 transitions. Word has length 26 [2021-06-05 16:36:01,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:01,049 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 6870 transitions. [2021-06-05 16:36:01,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 6870 transitions. [2021-06-05 16:36:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:01,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:01,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:01,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2677,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:01,275 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1345509615, now seen corresponding path program 35 times [2021-06-05 16:36:01,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:01,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299989316] [2021-06-05 16:36:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:01,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:01,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299989316] [2021-06-05 16:36:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299989316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:01,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064302151] [2021-06-05 16:36:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:01,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:01,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:01,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:01,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,878 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:01,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:01,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,900 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:01,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:01,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:01,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,922 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:01,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:01,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,944 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:01,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:01,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:01,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:01,964 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:01,979 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:01,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:01,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:36:01,993 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:01,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:02,004 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:02,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:02,006 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:02,015 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:02,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:02,016 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:02,027 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:02,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:02,028 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:02,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:02,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:02,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 16:36:02,035 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:02,136 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-06-05 16:36:02,137 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-06-05 16:36:02,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:36:02,138 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-06-05 16:36:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:02,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064302151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:02,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:02,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:36:02,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904793744] [2021-06-05 16:36:02,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:02,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:02,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:02,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:02,230 INFO L87 Difference]: Start difference. First operand 2003 states and 6870 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:03,573 INFO L93 Difference]: Finished difference Result 2949 states and 9724 transitions. [2021-06-05 16:36:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:36:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:03,577 INFO L225 Difference]: With dead ends: 2949 [2021-06-05 16:36:03,577 INFO L226 Difference]: Without dead ends: 2899 [2021-06-05 16:36:03,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1328.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:36:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-06-05 16:36:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 1994. [2021-06-05 16:36:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.4290015052684395) internal successors, (6834), 1993 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6834 transitions. [2021-06-05 16:36:03,603 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6834 transitions. Word has length 26 [2021-06-05 16:36:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:03,603 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6834 transitions. [2021-06-05 16:36:03,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6834 transitions. [2021-06-05 16:36:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:03,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:03,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:03,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2721,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:03,806 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:03,806 INFO L82 PathProgramCache]: Analyzing trace with hash -583168205, now seen corresponding path program 36 times [2021-06-05 16:36:03,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:03,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344047974] [2021-06-05 16:36:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:03,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344047974] [2021-06-05 16:36:03,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344047974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590959340] [2021-06-05 16:36:03,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:04,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:04,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:04,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,369 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:04,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:04,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,487 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 16:36:04,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,501 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:04,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:04,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:36:04,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,625 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:36:04,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:36:04,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,649 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:04,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:04,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,752 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 16:36:04,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:04,766 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:04,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:04,779 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:04,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:04,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:04,868 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:293, output treesize:141 [2021-06-05 16:36:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590959340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:04,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:04,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 16:36:04,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348969435] [2021-06-05 16:36:04,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:04,996 INFO L87 Difference]: Start difference. First operand 1994 states and 6834 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:05,631 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 16:36:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:05,855 INFO L93 Difference]: Finished difference Result 2201 states and 7427 transitions. [2021-06-05 16:36:05,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:36:05,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:05,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:05,858 INFO L225 Difference]: With dead ends: 2201 [2021-06-05 16:36:05,858 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 16:36:05,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 948.4ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:36:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 16:36:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1990. [2021-06-05 16:36:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 3.431875314228255) internal successors, (6826), 1989 states have internal predecessors, (6826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 6826 transitions. [2021-06-05 16:36:05,879 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 6826 transitions. Word has length 26 [2021-06-05 16:36:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:05,880 INFO L482 AbstractCegarLoop]: Abstraction has 1990 states and 6826 transitions. [2021-06-05 16:36:05,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 6826 transitions. [2021-06-05 16:36:05,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:05,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:05,882 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:06,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:06,082 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:06,083 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 37 times [2021-06-05 16:36:06,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:06,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108152872] [2021-06-05 16:36:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:06,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:06,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108152872] [2021-06-05 16:36:06,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108152872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:06,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980403087] [2021-06-05 16:36:06,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:06,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:06,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:06,639 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 16:36:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:06,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:06,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:06,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:06,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:06,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:36:06,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,118 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 16:36:07,118 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-06-05 16:36:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:36:07,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,146 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:07,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:07,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,301 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:36:07,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:07,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,330 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:07,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,463 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:36:07,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:07,478 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:07,490 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,732 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 16:36:07,732 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.5 percent of original size [2021-06-05 16:36:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:07,748 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:07,758 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:07,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:36:07,760 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:07,862 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 16:36:07,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:07,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:36:07,884 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:170 [2021-06-05 16:36:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:08,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980403087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:08,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:08,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:36:08,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40143204] [2021-06-05 16:36:08,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:08,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:08,014 INFO L87 Difference]: Start difference. First operand 1990 states and 6826 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:08,737 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-05 16:36:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:08,951 INFO L93 Difference]: Finished difference Result 2694 states and 8981 transitions. [2021-06-05 16:36:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:36:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:08,955 INFO L225 Difference]: With dead ends: 2694 [2021-06-05 16:36:08,955 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 16:36:08,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1079.6ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:36:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 16:36:08,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1999. [2021-06-05 16:36:08,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.4334334334334335) internal successors, (6860), 1998 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6860 transitions. [2021-06-05 16:36:08,983 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6860 transitions. Word has length 26 [2021-06-05 16:36:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:08,983 INFO L482 AbstractCegarLoop]: Abstraction has 1999 states and 6860 transitions. [2021-06-05 16:36:08,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6860 transitions. [2021-06-05 16:36:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:08,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:08,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:09,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2801 [2021-06-05 16:36:09,186 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash -858801881, now seen corresponding path program 38 times [2021-06-05 16:36:09,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:09,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699224725] [2021-06-05 16:36:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:09,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:09,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699224725] [2021-06-05 16:36:09,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699224725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:09,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564589954] [2021-06-05 16:36:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:09,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:09,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:09,802 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:36:10,121 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2021-06-05 16:36:10,203 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_290, v_prenex_289]} [2021-06-05 16:36:10,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:10,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,302 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 16:36:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:10,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:10,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,365 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.5 percent of original size [2021-06-05 16:36:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:10,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:10,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:10,370 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:10,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:10,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:36:10,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-06-05 16:36:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:10,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564589954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:10,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:10,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:36:10,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467861100] [2021-06-05 16:36:10,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:10,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:10,434 INFO L87 Difference]: Start difference. First operand 1999 states and 6860 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:11,344 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:36:11,728 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 86 [2021-06-05 16:36:11,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:11,934 INFO L93 Difference]: Finished difference Result 2703 states and 8943 transitions. [2021-06-05 16:36:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:36:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:11,938 INFO L225 Difference]: With dead ends: 2703 [2021-06-05 16:36:11,938 INFO L226 Difference]: Without dead ends: 2658 [2021-06-05 16:36:11,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1782.0ms TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:36:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-06-05 16:36:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 1983. [2021-06-05 16:36:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-06-05 16:36:11,962 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-06-05 16:36:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:11,962 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-06-05 16:36:11,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-06-05 16:36:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:11,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:11,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:12,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:12,165 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 39 times [2021-06-05 16:36:12,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:12,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848205411] [2021-06-05 16:36:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:12,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:12,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848205411] [2021-06-05 16:36:12,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848205411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:12,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296640777] [2021-06-05 16:36:12,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:12,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:36:12,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:12,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:36:12,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:12,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:12,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:12,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:12,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:36:12,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:12,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:12,723 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:12,729 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:12,735 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:12,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:36:12,747 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:12,752 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:12,757 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:12,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:12,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:12,761 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:12,780 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:36:12,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:12,781 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:36:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:12,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296640777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:12,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:12,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:36:12,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470311841] [2021-06-05 16:36:12,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:12,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:12,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:12,804 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:13,323 INFO L93 Difference]: Finished difference Result 2475 states and 8338 transitions. [2021-06-05 16:36:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:36:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:13,327 INFO L225 Difference]: With dead ends: 2475 [2021-06-05 16:36:13,327 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 16:36:13,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:36:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 16:36:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1983. [2021-06-05 16:36:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-06-05 16:36:13,350 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-06-05 16:36:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:13,350 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-06-05 16:36:13,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:13,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-06-05 16:36:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:13,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:13,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:13,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2849,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:13,553 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 40 times [2021-06-05 16:36:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:13,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621708725] [2021-06-05 16:36:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:13,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:13,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621708725] [2021-06-05 16:36:13,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621708725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:13,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588872422] [2021-06-05 16:36:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:13,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:13,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:36:13,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:14,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:14,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:14,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:36:14,062 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:14,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:14,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:14,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:14,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:14,093 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:14,099 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 16:36:14,106 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 16:36:14,112 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:14,118 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:14,123 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:14,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:36:14,127 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:14,147 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:36:14,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:14,148 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 16:36:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:14,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588872422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:14,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:14,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:36:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085087032] [2021-06-05 16:36:14,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:14,195 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:15,237 INFO L93 Difference]: Finished difference Result 2790 states and 9280 transitions. [2021-06-05 16:36:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:36:15,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:15,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:15,241 INFO L225 Difference]: With dead ends: 2790 [2021-06-05 16:36:15,241 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 16:36:15,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:36:15,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 16:36:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 1983. [2021-06-05 16:36:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.43087790110999) internal successors, (6800), 1982 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6800 transitions. [2021-06-05 16:36:15,273 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6800 transitions. Word has length 26 [2021-06-05 16:36:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:15,273 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 6800 transitions. [2021-06-05 16:36:15,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6800 transitions. [2021-06-05 16:36:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:15,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:15,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:15,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2891,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:15,476 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 41 times [2021-06-05 16:36:15,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:15,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009435928] [2021-06-05 16:36:15,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:15,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:15,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009435928] [2021-06-05 16:36:15,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009435928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:15,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499170828] [2021-06-05 16:36:15,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:15,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:15,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:15,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:15,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:16,025 INFO L628 ElimStorePlain]: treesize reduction 121, result has 44.0 percent of original size [2021-06-05 16:36:16,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:16,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:16,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:16,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:16,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:16,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:16,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:16,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:16,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:16,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:16,088 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:16,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:16,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:36:16,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:248, output treesize:22 [2021-06-05 16:36:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499170828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:16,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:16,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:36:16,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597148366] [2021-06-05 16:36:16,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:16,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:16,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:16,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:16,148 INFO L87 Difference]: Start difference. First operand 1983 states and 6800 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:16,817 INFO L93 Difference]: Finished difference Result 2608 states and 8716 transitions. [2021-06-05 16:36:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:36:16,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:16,821 INFO L225 Difference]: With dead ends: 2608 [2021-06-05 16:36:16,821 INFO L226 Difference]: Without dead ends: 2578 [2021-06-05 16:36:16,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:36:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-06-05 16:36:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1986. [2021-06-05 16:36:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.433249370277078) internal successors, (6815), 1985 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6815 transitions. [2021-06-05 16:36:16,845 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6815 transitions. Word has length 26 [2021-06-05 16:36:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:16,845 INFO L482 AbstractCegarLoop]: Abstraction has 1986 states and 6815 transitions. [2021-06-05 16:36:16,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6815 transitions. [2021-06-05 16:36:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:16,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:16,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:17,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2935,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:17,048 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 42 times [2021-06-05 16:36:17,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:17,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80747147] [2021-06-05 16:36:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:17,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80747147] [2021-06-05 16:36:17,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80747147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:17,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281433505] [2021-06-05 16:36:17,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:17,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:36:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,599 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:17,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:17,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:17,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:17,725 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:36:17,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,739 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:17,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:17,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:36:17,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:17,868 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:36:17,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:17,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,892 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:17,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:17,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:17,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:17,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:17,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:36:18,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:18,010 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:18,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:18,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:18,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:18,099 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:141 [2021-06-05 16:36:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:18,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281433505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:18,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:18,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:36:18,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211845186] [2021-06-05 16:36:18,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:18,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:18,221 INFO L87 Difference]: Start difference. First operand 1986 states and 6815 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:18,724 INFO L93 Difference]: Finished difference Result 2559 states and 8622 transitions. [2021-06-05 16:36:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:36:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:18,728 INFO L225 Difference]: With dead ends: 2559 [2021-06-05 16:36:18,728 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 16:36:18,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 712.7ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:36:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 16:36:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2010. [2021-06-05 16:36:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.4310602289696366) internal successors, (6893), 2009 states have internal predecessors, (6893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:18,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 6893 transitions. [2021-06-05 16:36:18,752 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 6893 transitions. Word has length 26 [2021-06-05 16:36:18,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:18,752 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 6893 transitions. [2021-06-05 16:36:18,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 6893 transitions. [2021-06-05 16:36:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:18,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:18,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:18,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2949 [2021-06-05 16:36:18,955 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 43 times [2021-06-05 16:36:18,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:18,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633509721] [2021-06-05 16:36:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:19,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633509721] [2021-06-05 16:36:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633509721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284636026] [2021-06-05 16:36:19,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:19,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:19,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:19,584 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 16:36:19,796 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 47 [2021-06-05 16:36:19,854 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_313, v_prenex_314], 2=[A, v_prenex_312]} [2021-06-05 16:36:19,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:19,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:19,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:19,988 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-06-05 16:36:19,989 INFO L628 ElimStorePlain]: treesize reduction 117, result has 43.8 percent of original size [2021-06-05 16:36:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:19,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 16:36:19,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:20,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:20,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:20,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:20,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:20,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:20,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:20,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:20,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:20,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:20,074 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:222, output treesize:15 [2021-06-05 16:36:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:20,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284636026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:20,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:20,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:36:20,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995275495] [2021-06-05 16:36:20,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:36:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:36:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:36:20,112 INFO L87 Difference]: Start difference. First operand 2010 states and 6893 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:20,761 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:36:20,955 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-06-05 16:36:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:21,098 INFO L93 Difference]: Finished difference Result 2656 states and 8840 transitions. [2021-06-05 16:36:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:36:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:21,102 INFO L225 Difference]: With dead ends: 2656 [2021-06-05 16:36:21,102 INFO L226 Difference]: Without dead ends: 2611 [2021-06-05 16:36:21,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1383.6ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:36:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-06-05 16:36:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2044. [2021-06-05 16:36:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 2043 states have (on average 3.4322075379344104) internal successors, (7012), 2043 states have internal predecessors, (7012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 7012 transitions. [2021-06-05 16:36:21,132 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 7012 transitions. Word has length 26 [2021-06-05 16:36:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:21,132 INFO L482 AbstractCegarLoop]: Abstraction has 2044 states and 7012 transitions. [2021-06-05 16:36:21,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:21,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 7012 transitions. [2021-06-05 16:36:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:21,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:21,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:21,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2981 [2021-06-05 16:36:21,335 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:21,335 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 44 times [2021-06-05 16:36:21,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:21,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172811035] [2021-06-05 16:36:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:21,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:21,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172811035] [2021-06-05 16:36:21,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172811035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:21,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393764104] [2021-06-05 16:36:21,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:21,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:21,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:36:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:21,994 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:36:22,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:22,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:36:22,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:22,536 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 150 [2021-06-05 16:36:22,536 INFO L628 ElimStorePlain]: treesize reduction 139, result has 74.8 percent of original size [2021-06-05 16:36:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:22,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:22,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:36:22,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:22,581 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:36:22,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:22,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:22,887 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-06-05 16:36:22,887 INFO L628 ElimStorePlain]: treesize reduction 32, result has 91.6 percent of original size [2021-06-05 16:36:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:22,910 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:22,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:36:22,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,068 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 16:36:23,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:23,092 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:23,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:36:23,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,236 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 16:36:23,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:23,264 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:23,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:36:23,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:23,280 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 16:36:23,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:36:23,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,392 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 16:36:23,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:23,415 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:23,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:36:23,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,528 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 16:36:23,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:23,548 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:23,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:23,550 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,653 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:36:23,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:23,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:36:23,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:23,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:23,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:23,792 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-06-05 16:36:23,968 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-06-05 16:36:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:24,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393764104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:24,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:24,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:36:24,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885113617] [2021-06-05 16:36:24,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:36:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:36:24,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:36:24,001 INFO L87 Difference]: Start difference. First operand 2044 states and 7012 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:24,281 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 16:36:24,714 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-05 16:36:25,002 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:36:25,174 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:36:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:25,427 INFO L93 Difference]: Finished difference Result 2980 states and 9896 transitions. [2021-06-05 16:36:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:36:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:25,432 INFO L225 Difference]: With dead ends: 2980 [2021-06-05 16:36:25,432 INFO L226 Difference]: Without dead ends: 2950 [2021-06-05 16:36:25,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1718.7ms TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:36:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-06-05 16:36:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2027. [2021-06-05 16:36:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.428923988153998) internal successors, (6947), 2026 states have internal predecessors, (6947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6947 transitions. [2021-06-05 16:36:25,466 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6947 transitions. Word has length 26 [2021-06-05 16:36:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:25,467 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6947 transitions. [2021-06-05 16:36:25,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6947 transitions. [2021-06-05 16:36:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:25,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:25,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:25,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2995,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:25,670 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:25,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 45 times [2021-06-05 16:36:25,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:25,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158298679] [2021-06-05 16:36:25,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:25,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:25,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158298679] [2021-06-05 16:36:25,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158298679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:25,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032217879] [2021-06-05 16:36:25,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:25,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:36:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:25,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:36:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:26,254 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:36:26,367 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_343, v_prenex_344, v_prenex_345], 3=[v_prenex_347]} [2021-06-05 16:36:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:26,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:36:26,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:26,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:36:26,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,739 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-06-05 16:36:26,740 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.6 percent of original size [2021-06-05 16:36:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:26,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:26,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:26,770 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:26,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:36:26,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,913 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:36:26,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:26,927 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:26,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:26,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:26,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:26,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:26,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:36:26,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:27,076 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:36:27,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:27,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:27,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:27,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:27,108 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:27,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:36:27,109 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:27,229 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 16:36:27,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:27,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:27,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:27,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 16:36:27,245 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:27,254 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 16:36:27,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 16:36:27,256 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:27,360 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 16:36:27,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:27,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:36:27,366 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:425, output treesize:180 [2021-06-05 16:36:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:27,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032217879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:27,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:27,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:36:27,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509113853] [2021-06-05 16:36:27,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:36:27,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:36:27,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:36:27,506 INFO L87 Difference]: Start difference. First operand 2027 states and 6947 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:28,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:28,132 INFO L93 Difference]: Finished difference Result 2615 states and 8782 transitions. [2021-06-05 16:36:28,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 16:36:28,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:28,135 INFO L225 Difference]: With dead ends: 2615 [2021-06-05 16:36:28,136 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 16:36:28,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:36:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 16:36:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2027. [2021-06-05 16:36:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.430898321816387) internal successors, (6951), 2026 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6951 transitions. [2021-06-05 16:36:28,160 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6951 transitions. Word has length 26 [2021-06-05 16:36:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:28,160 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6951 transitions. [2021-06-05 16:36:28,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6951 transitions. [2021-06-05 16:36:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:28,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:28,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:28,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3038 [2021-06-05 16:36:28,363 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 46 times [2021-06-05 16:36:28,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:28,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083553331] [2021-06-05 16:36:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:28,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:28,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083553331] [2021-06-05 16:36:28,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083553331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:28,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095854763] [2021-06-05 16:36:28,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:28,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:36:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:28,938 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 16:36:29,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:29,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:29,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 16:36:29,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:29,245 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:29,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:29,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:29,614 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-06-05 16:36:29,615 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-06-05 16:36:29,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:29,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:29,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:36:29,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:29,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:29,660 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:29,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:29,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,006 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 16:36:30,006 INFO L628 ElimStorePlain]: treesize reduction 14, result has 96.3 percent of original size [2021-06-05 16:36:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:30,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:36:30,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:30,047 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:30,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:30,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,355 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-06-05 16:36:30,355 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-06-05 16:36:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:30,378 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:30,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 16:36:30,381 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:30,401 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:36:30,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:36:30,402 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,542 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 16:36:30,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:30,562 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:36:30,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:36:30,563 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:30,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:30,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 16:36:30,581 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:30,711 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 16:36:30,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:30,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:36:30,742 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:247 [2021-06-05 16:36:30,868 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-06-05 16:36:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:30,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095854763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:30,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:30,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 16:36:30,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2807098] [2021-06-05 16:36:30,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:36:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:36:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:36:30,903 INFO L87 Difference]: Start difference. First operand 2027 states and 6951 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:31,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:31,553 INFO L93 Difference]: Finished difference Result 2605 states and 8786 transitions. [2021-06-05 16:36:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:36:31,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:31,557 INFO L225 Difference]: With dead ends: 2605 [2021-06-05 16:36:31,557 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 16:36:31,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 986.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:36:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 16:36:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2027. [2021-06-05 16:36:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.430898321816387) internal successors, (6951), 2026 states have internal predecessors, (6951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 6951 transitions. [2021-06-05 16:36:31,586 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 6951 transitions. Word has length 26 [2021-06-05 16:36:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:31,587 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 6951 transitions. [2021-06-05 16:36:31,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 6951 transitions. [2021-06-05 16:36:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:31,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:31,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:31,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 16:36:31,804 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-06-05 16:36:31,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:31,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052783848] [2021-06-05 16:36:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:31,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052783848] [2021-06-05 16:36:31,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052783848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:31,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682083447] [2021-06-05 16:36:31,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:36:31,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:32,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:32,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:36:32,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:36:32,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:36:32,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:36:32,448 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:36:32,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:36:32,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:36:32,477 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:36:32,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:36:32,496 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:32,505 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:36:32,513 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:36:32,521 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:36:32,528 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:32,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:36:32,532 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:32,551 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:36:32,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:32,552 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:36:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:32,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682083447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:32,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:32,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:36:32,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292817542] [2021-06-05 16:36:32,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:36:32,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:32,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:36:32,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:36:32,575 INFO L87 Difference]: Start difference. First operand 2027 states and 6951 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:33,168 INFO L93 Difference]: Finished difference Result 2632 states and 8515 transitions. [2021-06-05 16:36:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:36:33,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:33,172 INFO L225 Difference]: With dead ends: 2632 [2021-06-05 16:36:33,172 INFO L226 Difference]: Without dead ends: 2595 [2021-06-05 16:36:33,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:36:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-06-05 16:36:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2051. [2021-06-05 16:36:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.430731707317073) internal successors, (7033), 2050 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7033 transitions. [2021-06-05 16:36:33,198 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7033 transitions. Word has length 26 [2021-06-05 16:36:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:33,198 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7033 transitions. [2021-06-05 16:36:33,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:33,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7033 transitions. [2021-06-05 16:36:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:33,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:33,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:33,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-06-05 16:36:33,402 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:33,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-06-05 16:36:33,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:33,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512167633] [2021-06-05 16:36:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:33,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:33,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512167633] [2021-06-05 16:36:33,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512167633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:33,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967992685] [2021-06-05 16:36:33,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:33,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:36:33,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:33,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:36:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:33,838 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_357], 5=[v_prenex_361, v_prenex_359]} [2021-06-05 16:36:33,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:33,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:33,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:33,935 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.1 percent of original size [2021-06-05 16:36:33,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:33,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:33,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 16:36:33,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:33,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:33,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:33,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:36:34,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:34,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:34,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:36:34,023 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:22 [2021-06-05 16:36:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:34,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967992685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:34,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:34,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 16:36:34,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314248719] [2021-06-05 16:36:34,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:36:34,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:34,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:36:34,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:36:34,061 INFO L87 Difference]: Start difference. First operand 2051 states and 7033 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:34,960 INFO L93 Difference]: Finished difference Result 2527 states and 8437 transitions. [2021-06-05 16:36:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:36:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:34,963 INFO L225 Difference]: With dead ends: 2527 [2021-06-05 16:36:34,963 INFO L226 Difference]: Without dead ends: 2481 [2021-06-05 16:36:34,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 856.2ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:36:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-06-05 16:36:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2047. [2021-06-05 16:36:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 3.424731182795699) internal successors, (7007), 2046 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 7007 transitions. [2021-06-05 16:36:34,988 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 7007 transitions. Word has length 26 [2021-06-05 16:36:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:34,988 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 7007 transitions. [2021-06-05 16:36:34,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:34,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 7007 transitions. [2021-06-05 16:36:34,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:34,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:34,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:35,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3240 [2021-06-05 16:36:35,191 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:35,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-06-05 16:36:35,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:35,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750304886] [2021-06-05 16:36:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:35,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:35,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750304886] [2021-06-05 16:36:35,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750304886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:35,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024358840] [2021-06-05 16:36:35,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:35,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:36:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:35,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:36:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:35,820 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:36:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,110 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 16:36:36,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 16:36:36,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,158 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:36:36,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 16:36:36,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:36,521 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 16:36:36,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:36,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:36:36,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,586 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:36:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 16:36:36,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:36,957 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 16:36:36,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:36,995 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:36:36,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:36:36,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:37,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:37,024 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 16:36:37,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 16:36:37,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:37,639 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-05 16:36:37,640 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.5 percent of original size [2021-06-05 16:36:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:37,678 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:36:37,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 16:36:37,679 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:37,705 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:36:37,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-05 16:36:37,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:38,004 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 16:36:38,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:38,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,040 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:36:38,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:36:38,041 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:38,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 16:36:38,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:38,596 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2021-06-05 16:36:38,597 INFO L628 ElimStorePlain]: treesize reduction 28, result has 94.5 percent of original size [2021-06-05 16:36:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,626 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:36:38,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 16:36:38,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:38,653 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:36:38,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 16:36:38,657 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,096 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-06-05 16:36:39,096 INFO L628 ElimStorePlain]: treesize reduction 26, result has 94.1 percent of original size [2021-06-05 16:36:39,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,128 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:36:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:36:39,131 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,153 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:36:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-05 16:36:39,154 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,355 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:36:39,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,383 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 16:36:39,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 16:36:39,385 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:39,409 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:36:39,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:36:39,413 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:39,739 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-06-05 16:36:39,739 INFO L628 ElimStorePlain]: treesize reduction 24, result has 92.8 percent of original size [2021-06-05 16:36:39,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 16:36:39,760 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:721, output treesize:301 [2021-06-05 16:36:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:39,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024358840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:39,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:39,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:36:39,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730525526] [2021-06-05 16:36:39,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:39,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:39,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:39,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:39,902 INFO L87 Difference]: Start difference. First operand 2047 states and 7007 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:41,058 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 16:36:41,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:41,270 INFO L93 Difference]: Finished difference Result 2628 states and 8841 transitions. [2021-06-05 16:36:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:36:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:41,274 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 16:36:41,274 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 16:36:41,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1347.4ms TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:36:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 16:36:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2062. [2021-06-05 16:36:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.430373605046094) internal successors, (7070), 2061 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7070 transitions. [2021-06-05 16:36:41,299 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7070 transitions. Word has length 26 [2021-06-05 16:36:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:41,299 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 7070 transitions. [2021-06-05 16:36:41,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7070 transitions. [2021-06-05 16:36:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:41,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:41,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:41,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-06-05 16:36:41,502 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 47 times [2021-06-05 16:36:41,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:41,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864851623] [2021-06-05 16:36:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:41,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864851623] [2021-06-05 16:36:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864851623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747104604] [2021-06-05 16:36:41,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:41,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:36:41,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:42,182 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:36:42,384 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:36:42,665 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 50 [2021-06-05 16:36:42,701 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_390, v_prenex_391]} [2021-06-05 16:36:42,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:42,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:36:42,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:42,801 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 16:36:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:42,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:42,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:42,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:42,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:42,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:42,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:42,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:36:42,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:42,916 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.4 percent of original size [2021-06-05 16:36:42,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:36:42,919 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-06-05 16:36:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:42,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747104604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:42,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:42,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:36:42,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130015404] [2021-06-05 16:36:42,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:36:42,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:42,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:36:42,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:36:42,961 INFO L87 Difference]: Start difference. First operand 2062 states and 7070 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:43,615 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 16:36:44,111 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 119 [2021-06-05 16:36:44,657 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-06-05 16:36:45,156 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 86 [2021-06-05 16:36:45,592 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 125 [2021-06-05 16:36:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:45,899 INFO L93 Difference]: Finished difference Result 2678 states and 8891 transitions. [2021-06-05 16:36:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:36:45,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:45,903 INFO L225 Difference]: With dead ends: 2678 [2021-06-05 16:36:45,903 INFO L226 Difference]: Without dead ends: 2648 [2021-06-05 16:36:45,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3164.6ms TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:36:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-06-05 16:36:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2073. [2021-06-05 16:36:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 3.4305019305019306) internal successors, (7108), 2072 states have internal predecessors, (7108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 7108 transitions. [2021-06-05 16:36:45,927 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 7108 transitions. Word has length 26 [2021-06-05 16:36:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:45,927 INFO L482 AbstractCegarLoop]: Abstraction has 2073 states and 7108 transitions. [2021-06-05 16:36:45,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 7108 transitions. [2021-06-05 16:36:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:45,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:45,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:46,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-06-05 16:36:46,130 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:46,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:46,131 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-06-05 16:36:46,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:46,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531665717] [2021-06-05 16:36:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:46,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:46,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531665717] [2021-06-05 16:36:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531665717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:46,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071880182] [2021-06-05 16:36:46,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:46,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:36:46,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:36:46,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:46,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:36:46,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:36:46,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:36:46,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:36:46,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:46,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:36:46,798 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:36:46,806 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:36:46,813 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:36:46,820 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:36:46,829 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:36:46,837 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:36:46,845 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:36:46,852 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:36:46,859 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:46,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:36:46,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:36:46,863 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:46,884 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-06-05 16:36:46,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:36:46,885 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:36:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:46,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071880182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:46,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:46,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:36:46,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058967962] [2021-06-05 16:36:46,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:36:46,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:46,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:36:46,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:36:46,908 INFO L87 Difference]: Start difference. First operand 2073 states and 7108 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:47,926 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-05 16:36:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:48,284 INFO L93 Difference]: Finished difference Result 3338 states and 10716 transitions. [2021-06-05 16:36:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:36:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:48,289 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 16:36:48,289 INFO L226 Difference]: Without dead ends: 3295 [2021-06-05 16:36:48,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1120.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:36:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-06-05 16:36:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2202. [2021-06-05 16:36:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.452975920036347) internal successors, (7600), 2201 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 7600 transitions. [2021-06-05 16:36:48,320 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 7600 transitions. Word has length 26 [2021-06-05 16:36:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:48,320 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 7600 transitions. [2021-06-05 16:36:48,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:48,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 7600 transitions. [2021-06-05 16:36:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:48,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:48,323 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:48,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:48,523 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 48 times [2021-06-05 16:36:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:48,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641299000] [2021-06-05 16:36:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:48,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:48,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641299000] [2021-06-05 16:36:48,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641299000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:48,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964436506] [2021-06-05 16:36:48,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:48,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:36:48,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:36:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:36:48,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:49,259 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-05 16:36:49,632 INFO L446 ElimStorePlain]: Different costs {28=[v_prenex_418], 45=[A]} [2021-06-05 16:36:49,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:49,662 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:36:49,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 16:36:49,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:49,696 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:36:49,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 16:36:49,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:49,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:49,731 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:36:49,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 37 [2021-06-05 16:36:49,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:49,754 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:36:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:36:49,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:49,772 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:36:49,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:36:49,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:49,797 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:36:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 16:36:49,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,167 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-06-05 16:36:50,167 INFO L628 ElimStorePlain]: treesize reduction 162, result has 71.7 percent of original size [2021-06-05 16:36:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:50,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:50,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 16:36:50,199 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:50,230 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:36:50,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 16:36:50,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:50,256 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:36:50,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 31 [2021-06-05 16:36:50,260 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:50,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:50,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 36 [2021-06-05 16:36:50,286 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:50,314 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:36:50,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-06-05 16:36:50,316 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:50,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:50,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 32 [2021-06-05 16:36:50,339 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:50,489 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:36:50,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:50,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 2 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:36:50,506 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 16 variables, input treesize:801, output treesize:513 [2021-06-05 16:36:50,685 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-06-05 16:36:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964436506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:50,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:50,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:36:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188142320] [2021-06-05 16:36:50,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:36:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:36:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:36:50,790 INFO L87 Difference]: Start difference. First operand 2202 states and 7600 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:51,493 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 16:36:51,900 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 86 [2021-06-05 16:36:52,380 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-06-05 16:36:52,763 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 94 [2021-06-05 16:36:53,195 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 16:36:53,808 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-05 16:36:54,583 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-05 16:36:54,802 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 16:36:55,122 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-06-05 16:36:55,424 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 16:36:55,593 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-05 16:36:56,084 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-06-05 16:36:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:36:56,397 INFO L93 Difference]: Finished difference Result 3312 states and 10745 transitions. [2021-06-05 16:36:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:36:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:36:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:36:56,403 INFO L225 Difference]: With dead ends: 3312 [2021-06-05 16:36:56,403 INFO L226 Difference]: Without dead ends: 3267 [2021-06-05 16:36:56,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 5431.1ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:36:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-06-05 16:36:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 2225. [2021-06-05 16:36:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2225 states, 2224 states have (on average 3.459982014388489) internal successors, (7695), 2224 states have internal predecessors, (7695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:56,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 7695 transitions. [2021-06-05 16:36:56,437 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 7695 transitions. Word has length 26 [2021-06-05 16:36:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:36:56,438 INFO L482 AbstractCegarLoop]: Abstraction has 2225 states and 7695 transitions. [2021-06-05 16:36:56,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 7695 transitions. [2021-06-05 16:36:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:36:56,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:36:56,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:36:56,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3424,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:56,641 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:36:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:36:56,642 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 49 times [2021-06-05 16:36:56,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:36:56,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54636790] [2021-06-05 16:36:56,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:36:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:56,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:36:56,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54636790] [2021-06-05 16:36:56,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54636790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:56,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320347477] [2021-06-05 16:36:56,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:36:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:36:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:36:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:36:57,156 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 16:36:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:57,266 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:57,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:36:57,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:57,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:57,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:36:57,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:57,648 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 122 [2021-06-05 16:36:57,648 INFO L628 ElimStorePlain]: treesize reduction 71, result has 83.9 percent of original size [2021-06-05 16:36:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:57,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:57,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:57,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:57,678 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:36:57,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:36:57,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:57,803 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 16:36:57,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:57,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:36:57,818 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:57,942 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-05 16:36:57,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:57,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:57,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:36:57,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:58,074 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:36:58,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:58,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:36:58,090 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:58,215 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:36:58,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:58,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:58,235 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:58,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:58,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:36:58,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:58,427 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 16:36:58,427 INFO L628 ElimStorePlain]: treesize reduction 18, result has 92.1 percent of original size [2021-06-05 16:36:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:58,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:58,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:36:58,441 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:58,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:36:58,531 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:36:58,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:36:58,533 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:36:58,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:36:58,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:36:58,614 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-06-05 16:36:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:36:58,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320347477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:36:58,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:36:58,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:36:58,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868118020] [2021-06-05 16:36:58,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:36:58,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:36:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:36:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:36:58,738 INFO L87 Difference]: Start difference. First operand 2225 states and 7695 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:36:59,655 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 16:36:59,779 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-05 16:36:59,951 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-05 16:37:00,099 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-05 16:37:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:00,479 INFO L93 Difference]: Finished difference Result 3319 states and 10983 transitions. [2021-06-05 16:37:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:37:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:00,484 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 16:37:00,484 INFO L226 Difference]: Without dead ends: 3289 [2021-06-05 16:37:00,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1763.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:37:00,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-06-05 16:37:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 2211. [2021-06-05 16:37:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 3.4547511312217196) internal successors, (7635), 2210 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 7635 transitions. [2021-06-05 16:37:00,514 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 7635 transitions. Word has length 26 [2021-06-05 16:37:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:00,514 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 7635 transitions. [2021-06-05 16:37:00,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 7635 transitions. [2021-06-05 16:37:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:00,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:00,517 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:00,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3455,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:00,717 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:00,718 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-06-05 16:37:00,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:00,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791230789] [2021-06-05 16:37:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:00,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:00,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791230789] [2021-06-05 16:37:00,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791230789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:00,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862908394] [2021-06-05 16:37:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:00,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:37:00,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:00,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:00,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:37:01,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:01,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:37:01,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:37:01,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:37:01,377 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:37:01,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:37:01,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:37:01,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:37:01,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:37:01,436 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:37:01,447 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:37:01,475 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:37:01,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:01,493 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:01,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:01,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:37:01,499 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:01,526 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:37:01,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:37:01,528 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:37:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:01,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862908394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:01,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:01,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:37:01,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921866575] [2021-06-05 16:37:01,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:37:01,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:01,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:37:01,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:01,562 INFO L87 Difference]: Start difference. First operand 2211 states and 7635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:02,601 INFO L93 Difference]: Finished difference Result 3809 states and 12432 transitions. [2021-06-05 16:37:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:37:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:02,606 INFO L225 Difference]: With dead ends: 3809 [2021-06-05 16:37:02,607 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 16:37:02,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:37:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 16:37:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 2344. [2021-06-05 16:37:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.458386683738796) internal successors, (8103), 2343 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8103 transitions. [2021-06-05 16:37:02,642 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8103 transitions. Word has length 26 [2021-06-05 16:37:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:02,642 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8103 transitions. [2021-06-05 16:37:02,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8103 transitions. [2021-06-05 16:37:02,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:02,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:02,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:02,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:02,845 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-06-05 16:37:02,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:02,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792981313] [2021-06-05 16:37:02,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:02,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:02,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792981313] [2021-06-05 16:37:02,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792981313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:02,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119338806] [2021-06-05 16:37:02,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:03,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:37:03,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:03,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,215 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:37:03,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 16:37:03,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,271 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-05 16:37:03,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 16:37:03,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,298 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:37:03,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 16:37:03,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,315 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:03,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:37:03,316 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,342 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-05 16:37:03,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-05 16:37:03,347 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,382 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-05 16:37:03,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 29 [2021-06-05 16:37:03,384 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,417 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:37:03,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 25 [2021-06-05 16:37:03,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,440 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:03,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:37:03,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,457 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:03,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:37:03,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,484 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-05 16:37:03,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-06-05 16:37:03,485 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,512 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-06-05 16:37:03,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 30 [2021-06-05 16:37:03,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,529 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:03,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:37:03,530 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,546 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:03,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 16:37:03,546 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:03,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 16:37:03,578 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,601 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-05 16:37:03,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 16:37:03,602 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:03,611 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-05 16:37:03,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:37:03,612 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:03,694 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.9 percent of original size [2021-06-05 16:37:03,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:37:03,695 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:705, output treesize:78 [2021-06-05 16:37:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:03,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119338806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:03,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:03,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 16:37:03,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74260494] [2021-06-05 16:37:03,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:37:03,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:37:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:03,781 INFO L87 Difference]: Start difference. First operand 2344 states and 8103 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:05,089 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 16:37:05,292 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 16:37:05,743 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-05 16:37:05,980 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-05 16:37:06,557 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-06-05 16:37:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:06,703 INFO L93 Difference]: Finished difference Result 4305 states and 13885 transitions. [2021-06-05 16:37:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:37:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:06,709 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 16:37:06,709 INFO L226 Difference]: Without dead ends: 4252 [2021-06-05 16:37:06,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 2571.0ms TimeCoverageRelationStatistics Valid=556, Invalid=2096, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:37:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-06-05 16:37:06,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 2347. [2021-06-05 16:37:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.4578005115089514) internal successors, (8112), 2346 states have internal predecessors, (8112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8112 transitions. [2021-06-05 16:37:06,752 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8112 transitions. Word has length 26 [2021-06-05 16:37:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:06,753 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8112 transitions. [2021-06-05 16:37:06,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8112 transitions. [2021-06-05 16:37:06,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:06,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:06,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:06,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-06-05 16:37:06,956 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 50 times [2021-06-05 16:37:06,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:06,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367286143] [2021-06-05 16:37:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:07,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:07,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367286143] [2021-06-05 16:37:07,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367286143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:07,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571279947] [2021-06-05 16:37:07,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:07,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:07,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:37:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:07,570 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:37:07,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:07,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:07,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:07,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:07,893 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 16:37:07,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-06-05 16:37:07,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:07,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:07,911 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:37:07,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:07,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:08,372 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 124 [2021-06-05 16:37:08,373 INFO L628 ElimStorePlain]: treesize reduction 296, result has 58.8 percent of original size [2021-06-05 16:37:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,397 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 16:37:08,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 16:37:08,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:08,575 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:37:08,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:08,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:08,608 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:37:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 16:37:08,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:08,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:08,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-05 16:37:08,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:08,968 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 114 [2021-06-05 16:37:08,969 INFO L628 ElimStorePlain]: treesize reduction 27, result has 93.0 percent of original size [2021-06-05 16:37:08,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:08,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:08,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:08,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-05 16:37:08,999 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:09,015 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 16:37:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:37:09,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,143 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-05 16:37:09,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,167 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 16:37:09,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 16:37:09,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,301 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:37:09,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,323 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:37:09,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 27 [2021-06-05 16:37:09,327 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,453 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:37:09,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-06-05 16:37:09,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,594 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-05 16:37:09,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:09,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:09,617 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 16:37:09,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 16:37:09,621 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:09,731 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:37:09,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:09,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:09,737 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:785, output treesize:295 [2021-06-05 16:37:09,968 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-05 16:37:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:10,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571279947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:10,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:10,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 16:37:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995509206] [2021-06-05 16:37:10,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:37:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:37:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:37:10,099 INFO L87 Difference]: Start difference. First operand 2347 states and 8112 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:10,759 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 16:37:11,039 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 16:37:11,157 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-05 16:37:11,337 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 16:37:11,608 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 16:37:11,735 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 16:37:12,065 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:37:12,440 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-05 16:37:12,661 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-06-05 16:37:13,089 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 16:37:13,346 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 16:37:13,537 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 16:37:13,975 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 16:37:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:14,460 INFO L93 Difference]: Finished difference Result 3241 states and 10733 transitions. [2021-06-05 16:37:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:37:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:14,464 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 16:37:14,464 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 16:37:14,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 4219.7ms TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:37:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 16:37:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2360. [2021-06-05 16:37:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.454429843153879) internal successors, (8149), 2359 states have internal predecessors, (8149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8149 transitions. [2021-06-05 16:37:14,498 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8149 transitions. Word has length 26 [2021-06-05 16:37:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:14,498 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8149 transitions. [2021-06-05 16:37:14,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:14,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8149 transitions. [2021-06-05 16:37:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:14,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:14,501 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:14,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:14,702 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash -849869469, now seen corresponding path program 51 times [2021-06-05 16:37:14,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:14,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863705672] [2021-06-05 16:37:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:15,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:15,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863705672] [2021-06-05 16:37:15,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863705672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:15,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397750536] [2021-06-05 16:37:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:15,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:37:15,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:15,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:37:15,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:15,531 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:37:15,748 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 16:37:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:15,847 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:15,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:37:15,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:16,232 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 123 [2021-06-05 16:37:16,233 INFO L628 ElimStorePlain]: treesize reduction 130, result has 76.2 percent of original size [2021-06-05 16:37:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:16,247 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:16,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:37:16,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:16,424 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:37:16,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:16,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:37:16,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:16,611 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:37:16,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:16,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:37:16,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:16,782 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:37:16,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:16,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:16,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:16,942 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:37:16,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:16,954 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:16,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:37:16,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:17,098 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:37:17,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:17,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:17,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:17,117 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:17,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:17,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:37:17,129 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:17,248 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:37:17,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:17,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:17,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:17,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:17,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:17,284 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:17,467 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 16:37:17,467 INFO L628 ElimStorePlain]: treesize reduction 23, result has 90.6 percent of original size [2021-06-05 16:37:17,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:17,475 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:156 [2021-06-05 16:37:17,632 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-06-05 16:37:17,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:17,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397750536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:17,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:17,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 16:37:17,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626245212] [2021-06-05 16:37:17,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:17,675 INFO L87 Difference]: Start difference. First operand 2360 states and 8149 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:18,539 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 16:37:18,919 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-05 16:37:19,157 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 16:37:19,379 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-06-05 16:37:19,751 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:37:20,278 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-06-05 16:37:20,708 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 16:37:21,121 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 123 [2021-06-05 16:37:21,346 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 16:37:21,866 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2021-06-05 16:37:22,298 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 127 [2021-06-05 16:37:22,542 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 16:37:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:22,839 INFO L93 Difference]: Finished difference Result 3613 states and 11812 transitions. [2021-06-05 16:37:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:37:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:22,844 INFO L225 Difference]: With dead ends: 3613 [2021-06-05 16:37:22,844 INFO L226 Difference]: Without dead ends: 3568 [2021-06-05 16:37:22,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 5190.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1712, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:37:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2021-06-05 16:37:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 2356. [2021-06-05 16:37:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.456900212314225) internal successors, (8141), 2355 states have internal predecessors, (8141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8141 transitions. [2021-06-05 16:37:22,876 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8141 transitions. Word has length 26 [2021-06-05 16:37:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:22,876 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8141 transitions. [2021-06-05 16:37:22,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8141 transitions. [2021-06-05 16:37:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:22,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:22,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:23,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-06-05 16:37:23,081 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 52 times [2021-06-05 16:37:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:23,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882149789] [2021-06-05 16:37:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:23,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:23,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882149789] [2021-06-05 16:37:23,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882149789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:23,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268316679] [2021-06-05 16:37:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:23,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:23,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:23,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:23,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:23,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:37:23,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:23,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:23,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:37:23,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,321 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-06-05 16:37:24,322 INFO L628 ElimStorePlain]: treesize reduction 21, result has 94.3 percent of original size [2021-06-05 16:37:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:37:24,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,349 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:24,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:37:24,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,491 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 16:37:24,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,504 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:24,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:37:24,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:37:24,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,650 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:37:24,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,668 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:24,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:37:24,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:24,690 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,855 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-05 16:37:24,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,873 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 16:37:24,875 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:24,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:24,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:24,892 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:25,024 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 16:37:25,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:25,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:37:25,033 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:170 [2021-06-05 16:37:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:25,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268316679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:25,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:25,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 16:37:25,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804038271] [2021-06-05 16:37:25,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:37:25,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:25,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:37:25,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:25,202 INFO L87 Difference]: Start difference. First operand 2356 states and 8141 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:26,520 INFO L93 Difference]: Finished difference Result 3106 states and 10468 transitions. [2021-06-05 16:37:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:37:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:26,525 INFO L225 Difference]: With dead ends: 3106 [2021-06-05 16:37:26,525 INFO L226 Difference]: Without dead ends: 3081 [2021-06-05 16:37:26,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1503.1ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:37:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-06-05 16:37:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2358. [2021-06-05 16:37:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2358 states, 2357 states have (on average 3.4560882477725925) internal successors, (8146), 2357 states have internal predecessors, (8146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 8146 transitions. [2021-06-05 16:37:26,555 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 8146 transitions. Word has length 26 [2021-06-05 16:37:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:26,555 INFO L482 AbstractCegarLoop]: Abstraction has 2358 states and 8146 transitions. [2021-06-05 16:37:26,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 8146 transitions. [2021-06-05 16:37:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:26,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:26,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:26,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:26,758 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:26,758 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-06-05 16:37:26,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:26,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441084679] [2021-06-05 16:37:26,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:26,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441084679] [2021-06-05 16:37:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441084679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643897125] [2021-06-05 16:37:26,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:26,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:37:26,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:27,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:27,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 16:37:27,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:37:27,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:37:27,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 16:37:27,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 16:37:27,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:37:27,497 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:27,505 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:37:27,513 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 16:37:27,520 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:37:27,527 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 16:37:27,534 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:37:27,541 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:37:27,547 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:27,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:27,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 16:37:27,557 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:27,581 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-06-05 16:37:27,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:37:27,582 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 16:37:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:27,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643897125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:27,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:27,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 16:37:27,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591753125] [2021-06-05 16:37:27,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 16:37:27,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:27,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 16:37:27,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:37:27,605 INFO L87 Difference]: Start difference. First operand 2358 states and 8146 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:28,872 INFO L93 Difference]: Finished difference Result 3316 states and 11054 transitions. [2021-06-05 16:37:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:37:28,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:28,878 INFO L225 Difference]: With dead ends: 3316 [2021-06-05 16:37:28,878 INFO L226 Difference]: Without dead ends: 3273 [2021-06-05 16:37:28,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1174.9ms TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:37:28,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-06-05 16:37:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2398. [2021-06-05 16:37:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.4568210262828534) internal successors, (8286), 2397 states have internal predecessors, (8286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 8286 transitions. [2021-06-05 16:37:28,917 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 8286 transitions. Word has length 26 [2021-06-05 16:37:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:28,917 INFO L482 AbstractCegarLoop]: Abstraction has 2398 states and 8286 transitions. [2021-06-05 16:37:28,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 8286 transitions. [2021-06-05 16:37:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:28,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:28,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:29,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:29,121 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-06-05 16:37:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:29,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649249900] [2021-06-05 16:37:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:29,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:29,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649249900] [2021-06-05 16:37:29,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649249900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:29,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797941546] [2021-06-05 16:37:29,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:29,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:29,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:37:29,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:29,703 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 16:37:29,765 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_497], 5=[v_prenex_493, v_prenex_495]} [2021-06-05 16:37:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:29,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:29,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 16:37:29,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:29,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:37:29,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:29,908 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 16:37:29,908 INFO L628 ElimStorePlain]: treesize reduction 147, result has 42.1 percent of original size [2021-06-05 16:37:29,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 16:37:29,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:29,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:29,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 16:37:29,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:29,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:29,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:29,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 16:37:29,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:30,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:30,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:37:30,022 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:32 [2021-06-05 16:37:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:30,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797941546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:30,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:30,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 16:37:30,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173974934] [2021-06-05 16:37:30,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:30,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:30,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:30,061 INFO L87 Difference]: Start difference. First operand 2398 states and 8286 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:31,574 INFO L93 Difference]: Finished difference Result 3303 states and 11080 transitions. [2021-06-05 16:37:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:37:31,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:31,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:31,580 INFO L225 Difference]: With dead ends: 3303 [2021-06-05 16:37:31,580 INFO L226 Difference]: Without dead ends: 3269 [2021-06-05 16:37:31,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1569.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:37:31,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3269 states. [2021-06-05 16:37:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3269 to 2372. [2021-06-05 16:37:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 3.4571910586250527) internal successors, (8197), 2371 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 8197 transitions. [2021-06-05 16:37:31,615 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 8197 transitions. Word has length 26 [2021-06-05 16:37:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:31,616 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 8197 transitions. [2021-06-05 16:37:31,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 8197 transitions. [2021-06-05 16:37:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:31,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:31,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:31,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3801,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:31,819 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1804783987, now seen corresponding path program 53 times [2021-06-05 16:37:31,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:31,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447078805] [2021-06-05 16:37:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:32,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:32,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447078805] [2021-06-05 16:37:32,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447078805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:32,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978510565] [2021-06-05 16:37:32,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:32,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:37:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:37:32,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:32,566 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 16:37:32,799 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2021-06-05 16:37:32,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:32,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:32,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:32,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:32,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:37:32,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:33,028 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.3 percent of original size [2021-06-05 16:37:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:33,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 16:37:33,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:33,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:33,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:37:33,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 16:37:33,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:33,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:33,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:37:33,097 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:201, output treesize:32 [2021-06-05 16:37:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:33,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978510565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:33,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:33,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:37:33,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768349828] [2021-06-05 16:37:33,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:33,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:33,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:33,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:33,135 INFO L87 Difference]: Start difference. First operand 2372 states and 8197 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:34,010 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:37:34,664 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 108 [2021-06-05 16:37:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:34,844 INFO L93 Difference]: Finished difference Result 3196 states and 10649 transitions. [2021-06-05 16:37:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:37:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:34,850 INFO L225 Difference]: With dead ends: 3196 [2021-06-05 16:37:34,850 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 16:37:34,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 2073.2ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:37:34,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 16:37:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2383. [2021-06-05 16:37:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2382 states have (on average 3.4554995801847186) internal successors, (8231), 2382 states have internal predecessors, (8231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 8231 transitions. [2021-06-05 16:37:34,885 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 8231 transitions. Word has length 26 [2021-06-05 16:37:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:34,885 INFO L482 AbstractCegarLoop]: Abstraction has 2383 states and 8231 transitions. [2021-06-05 16:37:34,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 8231 transitions. [2021-06-05 16:37:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:34,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:34,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:35,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-05 16:37:35,089 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 54 times [2021-06-05 16:37:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:35,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778491580] [2021-06-05 16:37:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:35,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:35,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778491580] [2021-06-05 16:37:35,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778491580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:35,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049655993] [2021-06-05 16:37:35,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:35,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:37:35,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:35,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 16:37:35,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:35,810 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 16:37:35,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:35,903 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:37:35,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-06-05 16:37:35,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:35,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:35,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 36 [2021-06-05 16:37:35,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,341 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2021-06-05 16:37:36,341 INFO L628 ElimStorePlain]: treesize reduction 32, result has 94.4 percent of original size [2021-06-05 16:37:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,367 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-06-05 16:37:36,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2021-06-05 16:37:36,368 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,392 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:37:36,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:37:36,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,579 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:37:36,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,602 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-06-05 16:37:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 31 [2021-06-05 16:37:36,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,629 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:37:36,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-06-05 16:37:36,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,817 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 16:37:36,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:37:36,842 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:36,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:36,865 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:37:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 34 [2021-06-05 16:37:36,867 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:37,211 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2021-06-05 16:37:37,211 INFO L628 ElimStorePlain]: treesize reduction 19, result has 95.7 percent of original size [2021-06-05 16:37:37,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:37,236 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-06-05 16:37:37,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 36 [2021-06-05 16:37:37,240 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:37,258 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-06-05 16:37:37,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 16:37:37,259 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:37,413 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 16:37:37,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:37,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:37:37,424 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:613, output treesize:428 [2021-06-05 16:37:37,584 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-06-05 16:37:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:37,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049655993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:37,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:37,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 16:37:37,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980723694] [2021-06-05 16:37:37,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:37:37,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:37,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:37:37,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:37:37,761 INFO L87 Difference]: Start difference. First operand 2383 states and 8231 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:38,966 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-05 16:37:39,429 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-06-05 16:37:39,892 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 16:37:40,092 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-06-05 16:37:40,265 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 23 [2021-06-05 16:37:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:40,459 INFO L93 Difference]: Finished difference Result 3199 states and 10757 transitions. [2021-06-05 16:37:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:37:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:40,464 INFO L225 Difference]: With dead ends: 3199 [2021-06-05 16:37:40,464 INFO L226 Difference]: Without dead ends: 3174 [2021-06-05 16:37:40,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2593.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:37:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-05 16:37:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2376. [2021-06-05 16:37:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 3.4530526315789474) internal successors, (8201), 2375 states have internal predecessors, (8201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 8201 transitions. [2021-06-05 16:37:40,494 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 8201 transitions. Word has length 26 [2021-06-05 16:37:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:40,494 INFO L482 AbstractCegarLoop]: Abstraction has 2376 states and 8201 transitions. [2021-06-05 16:37:40,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 8201 transitions. [2021-06-05 16:37:40,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:40,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:40,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:40,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:40,699 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:40,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:40,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1700400349, now seen corresponding path program 55 times [2021-06-05 16:37:40,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:40,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907840813] [2021-06-05 16:37:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:40,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907840813] [2021-06-05 16:37:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907840813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:40,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403547606] [2021-06-05 16:37:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:37:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:41,493 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 16:37:41,569 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_536, A, v_prenex_538, v_prenex_539, v_prenex_543, v_prenex_533, v_prenex_535], 3=[v_prenex_541]} [2021-06-05 16:37:41,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,584 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:41,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:41,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:41,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,600 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:37:41,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:41,943 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-06-05 16:37:41,944 INFO L628 ElimStorePlain]: treesize reduction 71, result has 84.0 percent of original size [2021-06-05 16:37:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:41,959 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:41,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:37:41,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,105 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:37:42,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:42,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 16:37:42,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,258 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 16:37:42,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:42,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 16:37:42,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,507 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 104 [2021-06-05 16:37:42,507 INFO L628 ElimStorePlain]: treesize reduction 18, result has 93.2 percent of original size [2021-06-05 16:37:42,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,520 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:42,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:37:42,521 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:42,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 16:37:42,730 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:42,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 16:37:42,826 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:42,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:42,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 16:37:42,907 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:507, output treesize:154 [2021-06-05 16:37:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:43,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403547606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:43,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:43,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 16:37:43,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746475403] [2021-06-05 16:37:43,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:43,033 INFO L87 Difference]: Start difference. First operand 2376 states and 8201 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:43,943 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 16:37:44,132 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 16:37:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:44,474 INFO L93 Difference]: Finished difference Result 3405 states and 11394 transitions. [2021-06-05 16:37:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:37:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:44,479 INFO L225 Difference]: With dead ends: 3405 [2021-06-05 16:37:44,480 INFO L226 Difference]: Without dead ends: 3375 [2021-06-05 16:37:44,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1647.3ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:37:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-06-05 16:37:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2353. [2021-06-05 16:37:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 3.453231292517007) internal successors, (8122), 2352 states have internal predecessors, (8122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 8122 transitions. [2021-06-05 16:37:44,518 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 8122 transitions. Word has length 26 [2021-06-05 16:37:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:44,518 INFO L482 AbstractCegarLoop]: Abstraction has 2353 states and 8122 transitions. [2021-06-05 16:37:44,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 8122 transitions. [2021-06-05 16:37:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:44,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:44,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:44,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3867,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:44,722 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 56 times [2021-06-05 16:37:44,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:44,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130168690] [2021-06-05 16:37:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:44,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:44,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130168690] [2021-06-05 16:37:44,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130168690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:44,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046123420] [2021-06-05 16:37:44,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:44,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:44,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:37:44,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,192 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 16:37:45,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:45,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 16:37:45,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,215 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:45,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:45,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 16:37:45,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:45,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 16:37:45,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,257 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:45,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 16:37:45,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:37:45,267 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 16:37:45,278 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,287 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 16:37:45,288 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,300 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:45,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 16:37:45,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:45,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 16:37:45,314 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,323 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:37:45,324 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,333 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:37:45,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,342 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:45,343 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,351 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 16:37:45,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:37:45,351 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:45,359 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 16:37:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 16:37:45,360 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:45,447 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-06-05 16:37:45,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 16:37:45,448 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-06-05 16:37:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046123420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:45,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:45,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:37:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147046523] [2021-06-05 16:37:45,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:37:45,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:45,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:37:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:37:45,551 INFO L87 Difference]: Start difference. First operand 2353 states and 8122 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:46,496 INFO L93 Difference]: Finished difference Result 3078 states and 10413 transitions. [2021-06-05 16:37:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:37:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:46,501 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 16:37:46,501 INFO L226 Difference]: Without dead ends: 3063 [2021-06-05 16:37:46,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 939.6ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:37:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-06-05 16:37:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2355. [2021-06-05 16:37:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.45624468988955) internal successors, (8136), 2354 states have internal predecessors, (8136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8136 transitions. [2021-06-05 16:37:46,530 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8136 transitions. Word has length 26 [2021-06-05 16:37:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:46,530 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 8136 transitions. [2021-06-05 16:37:46,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8136 transitions. [2021-06-05 16:37:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 16:37:46,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:46,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3897 [2021-06-05 16:37:46,734 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-06-05 16:37:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611397168] [2021-06-05 16:37:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:46,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:46,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611397168] [2021-06-05 16:37:46,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611397168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:46,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059174320] [2021-06-05 16:37:46,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:46,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:37:46,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:37:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,379 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 16:37:47,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-06-05 16:37:47,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 16:37:47,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:37:47,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 16:37:47,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,487 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:37:47,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-06-05 16:37:47,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,516 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:37:47,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-06-05 16:37:47,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,535 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:37:47,535 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,563 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 16:37:47,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 16:37:47,567 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,584 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 16:37:47,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,601 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:37:47,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,618 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 16:37:47,619 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,635 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:37:47,636 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,659 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 16:37:47,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 16:37:47,662 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,677 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 16:37:47,678 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,701 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 16:37:47,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 16:37:47,703 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,718 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:37:47,718 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:37:47,727 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 16:37:47,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:37:47,728 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:37:47,822 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.3 percent of original size [2021-06-05 16:37:47,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:37:47,824 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 16:37:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:47,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059174320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:47,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:47,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 16:37:47,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555716804] [2021-06-05 16:37:47,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 16:37:47,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 16:37:47,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:37:47,904 INFO L87 Difference]: Start difference. First operand 2355 states and 8136 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:50,399 INFO L93 Difference]: Finished difference Result 3597 states and 11910 transitions. [2021-06-05 16:37:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:37:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 16:37:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:50,404 INFO L225 Difference]: With dead ends: 3597 [2021-06-05 16:37:50,404 INFO L226 Difference]: Without dead ends: 3553 [2021-06-05 16:37:50,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2152.9ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:37:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-06-05 16:37:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2397. [2021-06-05 16:37:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 3.451585976627713) internal successors, (8270), 2396 states have internal predecessors, (8270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 8270 transitions. [2021-06-05 16:37:50,441 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 8270 transitions. Word has length 26 [2021-06-05 16:37:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:50,441 INFO L482 AbstractCegarLoop]: Abstraction has 2397 states and 8270 transitions. [2021-06-05 16:37:50,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 8270 transitions. [2021-06-05 16:37:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:50,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:50,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:50,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3918 [2021-06-05 16:37:50,646 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 57 times [2021-06-05 16:37:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:50,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134259582] [2021-06-05 16:37:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:50,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:50,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134259582] [2021-06-05 16:37:50,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134259582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:50,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463046404] [2021-06-05 16:37:50,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:50,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:37:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:50,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463046404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:50,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:50,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:37:50,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913817533] [2021-06-05 16:37:50,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:50,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:50,812 INFO L87 Difference]: Start difference. First operand 2397 states and 8270 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:51,793 INFO L93 Difference]: Finished difference Result 5478 states and 17219 transitions. [2021-06-05 16:37:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:37:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:51,802 INFO L225 Difference]: With dead ends: 5478 [2021-06-05 16:37:51,802 INFO L226 Difference]: Without dead ends: 5478 [2021-06-05 16:37:51,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:37:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-06-05 16:37:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 2593. [2021-06-05 16:37:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.493827160493827) internal successors, (9056), 2592 states have internal predecessors, (9056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 9056 transitions. [2021-06-05 16:37:51,861 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 9056 transitions. Word has length 28 [2021-06-05 16:37:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:51,861 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 9056 transitions. [2021-06-05 16:37:51,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 9056 transitions. [2021-06-05 16:37:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:51,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:51,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:52,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:52,065 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 58 times [2021-06-05 16:37:52,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:52,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872922656] [2021-06-05 16:37:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:52,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:52,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872922656] [2021-06-05 16:37:52,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872922656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:52,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747586876] [2021-06-05 16:37:52,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:52,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:52,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:52,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747586876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:52,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:52,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:37:52,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390928344] [2021-06-05 16:37:52,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:37:52,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:37:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:37:52,277 INFO L87 Difference]: Start difference. First operand 2593 states and 9056 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:53,548 INFO L93 Difference]: Finished difference Result 7165 states and 22139 transitions. [2021-06-05 16:37:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:37:53,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:53,559 INFO L225 Difference]: With dead ends: 7165 [2021-06-05 16:37:53,559 INFO L226 Difference]: Without dead ends: 7165 [2021-06-05 16:37:53,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 756.4ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:37:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2021-06-05 16:37:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2604. [2021-06-05 16:37:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 3.4998079139454474) internal successors, (9110), 2603 states have internal predecessors, (9110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 9110 transitions. [2021-06-05 16:37:53,620 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 9110 transitions. Word has length 28 [2021-06-05 16:37:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:53,620 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 9110 transitions. [2021-06-05 16:37:53,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 9110 transitions. [2021-06-05 16:37:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:53,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:53,623 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:53,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 16:37:53,824 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 59 times [2021-06-05 16:37:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:53,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965243469] [2021-06-05 16:37:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:53,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:53,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965243469] [2021-06-05 16:37:53,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965243469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:53,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633333675] [2021-06-05 16:37:53,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:53,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:37:53,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:53,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:53,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633333675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:53,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:53,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:37:53,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806084862] [2021-06-05 16:37:53,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:37:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:53,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:37:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:37:53,998 INFO L87 Difference]: Start difference. First operand 2604 states and 9110 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:55,202 INFO L93 Difference]: Finished difference Result 6563 states and 20685 transitions. [2021-06-05 16:37:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:37:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:55,212 INFO L225 Difference]: With dead ends: 6563 [2021-06-05 16:37:55,212 INFO L226 Difference]: Without dead ends: 6563 [2021-06-05 16:37:55,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 733.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 16:37:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-06-05 16:37:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 2552. [2021-06-05 16:37:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 3.480203841630733) internal successors, (8878), 2551 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 8878 transitions. [2021-06-05 16:37:55,268 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 8878 transitions. Word has length 28 [2021-06-05 16:37:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:55,268 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 8878 transitions. [2021-06-05 16:37:55,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:55,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 8878 transitions. [2021-06-05 16:37:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:55,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:55,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:55,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:55,471 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 60 times [2021-06-05 16:37:55,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:55,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248711614] [2021-06-05 16:37:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:55,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248711614] [2021-06-05 16:37:55,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248711614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:55,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404932080] [2021-06-05 16:37:55,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:55,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:37:55,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:55,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404932080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:55,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:55,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:37:55,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063778232] [2021-06-05 16:37:55,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:37:55,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:55,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:37:55,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:37:55,635 INFO L87 Difference]: Start difference. First operand 2552 states and 8878 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:56,767 INFO L93 Difference]: Finished difference Result 5564 states and 17386 transitions. [2021-06-05 16:37:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:37:56,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:56,775 INFO L225 Difference]: With dead ends: 5564 [2021-06-05 16:37:56,775 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 16:37:56,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:37:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 16:37:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 2570. [2021-06-05 16:37:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.474114441416894) internal successors, (8925), 2569 states have internal predecessors, (8925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8925 transitions. [2021-06-05 16:37:56,820 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8925 transitions. Word has length 28 [2021-06-05 16:37:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:56,820 INFO L482 AbstractCegarLoop]: Abstraction has 2570 states and 8925 transitions. [2021-06-05 16:37:56,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8925 transitions. [2021-06-05 16:37:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:56,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:56,823 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:57,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 16:37:57,024 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 64 times [2021-06-05 16:37:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227934564] [2021-06-05 16:37:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:57,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227934564] [2021-06-05 16:37:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227934564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563003511] [2021-06-05 16:37:57,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:57,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:37:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:37:57,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:57,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563003511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:57,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:57,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:37:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545825098] [2021-06-05 16:37:57,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:37:57,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:37:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:37:57,177 INFO L87 Difference]: Start difference. First operand 2570 states and 8925 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:57,765 INFO L93 Difference]: Finished difference Result 4970 states and 15740 transitions. [2021-06-05 16:37:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:37:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:57,773 INFO L225 Difference]: With dead ends: 4970 [2021-06-05 16:37:57,773 INFO L226 Difference]: Without dead ends: 4970 [2021-06-05 16:37:57,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:37:57,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4970 states. [2021-06-05 16:37:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4970 to 2640. [2021-06-05 16:37:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 3.4588859416445623) internal successors, (9128), 2639 states have internal predecessors, (9128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 9128 transitions. [2021-06-05 16:37:57,823 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 9128 transitions. Word has length 28 [2021-06-05 16:37:57,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:57,823 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 9128 transitions. [2021-06-05 16:37:57,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:57,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 9128 transitions. [2021-06-05 16:37:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:57,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:57,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:58,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-05 16:37:58,050 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 61 times [2021-06-05 16:37:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:58,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815982642] [2021-06-05 16:37:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:58,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:58,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815982642] [2021-06-05 16:37:58,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815982642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:58,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682471556] [2021-06-05 16:37:58,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:58,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:37:58,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:37:58,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682471556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:58,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:58,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:37:58,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004461790] [2021-06-05 16:37:58,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:37:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:37:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:37:58,164 INFO L87 Difference]: Start difference. First operand 2640 states and 9128 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:58,339 INFO L93 Difference]: Finished difference Result 4201 states and 13809 transitions. [2021-06-05 16:37:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:37:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:58,345 INFO L225 Difference]: With dead ends: 4201 [2021-06-05 16:37:58,346 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 16:37:58,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:37:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 16:37:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 2983. [2021-06-05 16:37:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2983 states, 2982 states have (on average 3.5087189805499666) internal successors, (10463), 2982 states have internal predecessors, (10463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2983 states to 2983 states and 10463 transitions. [2021-06-05 16:37:58,391 INFO L78 Accepts]: Start accepts. Automaton has 2983 states and 10463 transitions. Word has length 28 [2021-06-05 16:37:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:58,391 INFO L482 AbstractCegarLoop]: Abstraction has 2983 states and 10463 transitions. [2021-06-05 16:37:58,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2983 states and 10463 transitions. [2021-06-05 16:37:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:58,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:58,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:58,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 16:37:58,608 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:58,608 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 62 times [2021-06-05 16:37:58,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:58,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59196045] [2021-06-05 16:37:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:58,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:58,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59196045] [2021-06-05 16:37:58,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59196045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:58,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963975018] [2021-06-05 16:37:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:58,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:37:58,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:58,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:37:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:58,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963975018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:58,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:58,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:37:58,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015489668] [2021-06-05 16:37:58,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:37:58,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:37:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:37:58,778 INFO L87 Difference]: Start difference. First operand 2983 states and 10463 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:37:59,349 INFO L93 Difference]: Finished difference Result 4805 states and 15497 transitions. [2021-06-05 16:37:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:37:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:37:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:37:59,358 INFO L225 Difference]: With dead ends: 4805 [2021-06-05 16:37:59,358 INFO L226 Difference]: Without dead ends: 4758 [2021-06-05 16:37:59,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:37:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2021-06-05 16:37:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 3157. [2021-06-05 16:37:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 3.5218631178707223) internal successors, (11115), 3156 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 11115 transitions. [2021-06-05 16:37:59,418 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 11115 transitions. Word has length 28 [2021-06-05 16:37:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:37:59,418 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 11115 transitions. [2021-06-05 16:37:59,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:37:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 11115 transitions. [2021-06-05 16:37:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:37:59,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:37:59,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:37:59,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:59,624 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:37:59,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:37:59,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 63 times [2021-06-05 16:37:59,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:37:59,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689656639] [2021-06-05 16:37:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:37:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:37:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:59,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:37:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689656639] [2021-06-05 16:37:59,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689656639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466743346] [2021-06-05 16:37:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:37:59,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:37:59,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:37:59,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:37:59,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:37:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:37:59,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466743346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:37:59,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:37:59,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:37:59,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852296229] [2021-06-05 16:37:59,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:37:59,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:37:59,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:37:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:37:59,779 INFO L87 Difference]: Start difference. First operand 3157 states and 11115 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:00,481 INFO L93 Difference]: Finished difference Result 5122 states and 16201 transitions. [2021-06-05 16:38:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:38:00,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:00,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:00,489 INFO L225 Difference]: With dead ends: 5122 [2021-06-05 16:38:00,489 INFO L226 Difference]: Without dead ends: 5096 [2021-06-05 16:38:00,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:38:00,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5096 states. [2021-06-05 16:38:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5096 to 3181. [2021-06-05 16:38:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 3180 states have (on average 3.5276729559748428) internal successors, (11218), 3180 states have internal predecessors, (11218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 11218 transitions. [2021-06-05 16:38:00,552 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 11218 transitions. Word has length 28 [2021-06-05 16:38:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:00,552 INFO L482 AbstractCegarLoop]: Abstraction has 3181 states and 11218 transitions. [2021-06-05 16:38:00,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:00,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 11218 transitions. [2021-06-05 16:38:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:00,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:00,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:00,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:00,757 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:00,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 64 times [2021-06-05 16:38:00,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:00,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123965311] [2021-06-05 16:38:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:00,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:00,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123965311] [2021-06-05 16:38:00,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123965311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:00,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648576106] [2021-06-05 16:38:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:00,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:00,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:00,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:00,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:00,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648576106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:00,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:00,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:38:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303119585] [2021-06-05 16:38:00,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:00,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:00,936 INFO L87 Difference]: Start difference. First operand 3181 states and 11218 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:01,626 INFO L93 Difference]: Finished difference Result 5123 states and 16231 transitions. [2021-06-05 16:38:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:38:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:01,633 INFO L225 Difference]: With dead ends: 5123 [2021-06-05 16:38:01,633 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 16:38:01,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:38:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 16:38:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 3184. [2021-06-05 16:38:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3184 states, 3183 states have (on average 3.522148916116871) internal successors, (11211), 3183 states have internal predecessors, (11211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 11211 transitions. [2021-06-05 16:38:01,687 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 11211 transitions. Word has length 28 [2021-06-05 16:38:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:01,687 INFO L482 AbstractCegarLoop]: Abstraction has 3184 states and 11211 transitions. [2021-06-05 16:38:01,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 11211 transitions. [2021-06-05 16:38:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:01,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:01,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:01,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:01,905 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 65 times [2021-06-05 16:38:01,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:01,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112669102] [2021-06-05 16:38:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:01,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:01,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112669102] [2021-06-05 16:38:01,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112669102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:01,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958001962] [2021-06-05 16:38:01,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:01,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:38:01,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:01,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:02,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958001962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:02,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:02,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:38:02,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850100937] [2021-06-05 16:38:02,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:02,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:02,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:02,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:02,031 INFO L87 Difference]: Start difference. First operand 3184 states and 11211 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:02,585 INFO L93 Difference]: Finished difference Result 5875 states and 18946 transitions. [2021-06-05 16:38:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:38:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:02,593 INFO L225 Difference]: With dead ends: 5875 [2021-06-05 16:38:02,594 INFO L226 Difference]: Without dead ends: 5792 [2021-06-05 16:38:02,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:38:02,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5792 states. [2021-06-05 16:38:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5792 to 3343. [2021-06-05 16:38:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 3342 states have (on average 3.5556552962298027) internal successors, (11883), 3342 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 11883 transitions. [2021-06-05 16:38:02,655 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 11883 transitions. Word has length 28 [2021-06-05 16:38:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:02,655 INFO L482 AbstractCegarLoop]: Abstraction has 3343 states and 11883 transitions. [2021-06-05 16:38:02,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 11883 transitions. [2021-06-05 16:38:02,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:02,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:02,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:02,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:02,859 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:02,860 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 66 times [2021-06-05 16:38:02,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:02,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263422493] [2021-06-05 16:38:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:02,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263422493] [2021-06-05 16:38:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263422493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862988288] [2021-06-05 16:38:02,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:02,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:38:02,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:38:02,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862988288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 16:38:02,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025510797] [2021-06-05 16:38:02,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:38:02,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:02,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:38:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:38:02,990 INFO L87 Difference]: Start difference. First operand 3343 states and 11883 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:03,148 INFO L93 Difference]: Finished difference Result 4624 states and 15329 transitions. [2021-06-05 16:38:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:38:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:03,155 INFO L225 Difference]: With dead ends: 4624 [2021-06-05 16:38:03,155 INFO L226 Difference]: Without dead ends: 4624 [2021-06-05 16:38:03,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:38:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-06-05 16:38:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 3098. [2021-06-05 16:38:03,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3097 states have (on average 3.5298676138198255) internal successors, (10932), 3097 states have internal predecessors, (10932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 10932 transitions. [2021-06-05 16:38:03,203 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 10932 transitions. Word has length 28 [2021-06-05 16:38:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:03,203 INFO L482 AbstractCegarLoop]: Abstraction has 3098 states and 10932 transitions. [2021-06-05 16:38:03,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 10932 transitions. [2021-06-05 16:38:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:03,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:03,207 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:03,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:03,408 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:03,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:03,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 67 times [2021-06-05 16:38:03,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:03,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364407220] [2021-06-05 16:38:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:03,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:03,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364407220] [2021-06-05 16:38:03,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364407220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:03,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111188735] [2021-06-05 16:38:03,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:03,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111188735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:03,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:03,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:38:03,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812446265] [2021-06-05 16:38:03,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:03,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:03,550 INFO L87 Difference]: Start difference. First operand 3098 states and 10932 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:04,212 INFO L93 Difference]: Finished difference Result 6516 states and 20731 transitions. [2021-06-05 16:38:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:38:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:04,221 INFO L225 Difference]: With dead ends: 6516 [2021-06-05 16:38:04,222 INFO L226 Difference]: Without dead ends: 6516 [2021-06-05 16:38:04,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:38:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6516 states. [2021-06-05 16:38:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6516 to 3116. [2021-06-05 16:38:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 3115 states have (on average 3.5296950240770464) internal successors, (10995), 3115 states have internal predecessors, (10995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 10995 transitions. [2021-06-05 16:38:04,283 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 10995 transitions. Word has length 28 [2021-06-05 16:38:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:04,283 INFO L482 AbstractCegarLoop]: Abstraction has 3116 states and 10995 transitions. [2021-06-05 16:38:04,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 10995 transitions. [2021-06-05 16:38:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:04,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:04,287 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:04,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-06-05 16:38:04,487 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:04,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 68 times [2021-06-05 16:38:04,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:04,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230028680] [2021-06-05 16:38:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:04,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:04,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230028680] [2021-06-05 16:38:04,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230028680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:04,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911254601] [2021-06-05 16:38:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:04,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911254601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:04,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:04,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:38:04,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005064232] [2021-06-05 16:38:04,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:04,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:04,639 INFO L87 Difference]: Start difference. First operand 3116 states and 10995 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:05,362 INFO L93 Difference]: Finished difference Result 6771 states and 21511 transitions. [2021-06-05 16:38:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:38:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:05,372 INFO L225 Difference]: With dead ends: 6771 [2021-06-05 16:38:05,372 INFO L226 Difference]: Without dead ends: 6771 [2021-06-05 16:38:05,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:38:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6771 states. [2021-06-05 16:38:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6771 to 3210. [2021-06-05 16:38:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3210 states, 3209 states have (on average 3.5219694608912433) internal successors, (11302), 3209 states have internal predecessors, (11302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3210 states to 3210 states and 11302 transitions. [2021-06-05 16:38:05,444 INFO L78 Accepts]: Start accepts. Automaton has 3210 states and 11302 transitions. Word has length 28 [2021-06-05 16:38:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:05,444 INFO L482 AbstractCegarLoop]: Abstraction has 3210 states and 11302 transitions. [2021-06-05 16:38:05,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3210 states and 11302 transitions. [2021-06-05 16:38:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:05,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:05,448 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:05,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 16:38:05,648 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 69 times [2021-06-05 16:38:05,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:05,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305133443] [2021-06-05 16:38:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:05,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305133443] [2021-06-05 16:38:05,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305133443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:05,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440719658] [2021-06-05 16:38:05,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:05,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:38:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:05,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:05,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440719658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:05,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:05,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:38:05,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035645818] [2021-06-05 16:38:05,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:05,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:05,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:05,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:05,776 INFO L87 Difference]: Start difference. First operand 3210 states and 11302 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:06,387 INFO L93 Difference]: Finished difference Result 6952 states and 22145 transitions. [2021-06-05 16:38:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:38:06,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:06,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:06,397 INFO L225 Difference]: With dead ends: 6952 [2021-06-05 16:38:06,397 INFO L226 Difference]: Without dead ends: 6916 [2021-06-05 16:38:06,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:38:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-06-05 16:38:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3597. [2021-06-05 16:38:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 3.5489432703003336) internal successors, (12762), 3596 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 12762 transitions. [2021-06-05 16:38:06,469 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 12762 transitions. Word has length 28 [2021-06-05 16:38:06,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:06,469 INFO L482 AbstractCegarLoop]: Abstraction has 3597 states and 12762 transitions. [2021-06-05 16:38:06,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 12762 transitions. [2021-06-05 16:38:06,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:06,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:06,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:06,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-05 16:38:06,674 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:06,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:06,674 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 70 times [2021-06-05 16:38:06,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:06,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225153501] [2021-06-05 16:38:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:06,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:06,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225153501] [2021-06-05 16:38:06,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225153501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:06,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217630958] [2021-06-05 16:38:06,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:06,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:06,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:06,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217630958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:06,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:06,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:38:06,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742594040] [2021-06-05 16:38:06,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:06,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:06,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:06,810 INFO L87 Difference]: Start difference. First operand 3597 states and 12762 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:07,406 INFO L93 Difference]: Finished difference Result 7145 states and 22690 transitions. [2021-06-05 16:38:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:38:07,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:07,416 INFO L225 Difference]: With dead ends: 7145 [2021-06-05 16:38:07,416 INFO L226 Difference]: Without dead ends: 7145 [2021-06-05 16:38:07,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 363.8ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:38:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7145 states. [2021-06-05 16:38:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7145 to 3308. [2021-06-05 16:38:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 3307 states have (on average 3.5119443604475356) internal successors, (11614), 3307 states have internal predecessors, (11614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 11614 transitions. [2021-06-05 16:38:07,493 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 11614 transitions. Word has length 28 [2021-06-05 16:38:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:07,493 INFO L482 AbstractCegarLoop]: Abstraction has 3308 states and 11614 transitions. [2021-06-05 16:38:07,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:07,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 11614 transitions. [2021-06-05 16:38:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:07,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:07,497 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:07,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4033 [2021-06-05 16:38:07,697 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:07,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 71 times [2021-06-05 16:38:07,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:07,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060814941] [2021-06-05 16:38:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:07,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060814941] [2021-06-05 16:38:07,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060814941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:07,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703831375] [2021-06-05 16:38:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:07,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:38:07,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:07,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:07,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703831375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:07,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:07,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:38:07,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355289195] [2021-06-05 16:38:07,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:07,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:07,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:07,831 INFO L87 Difference]: Start difference. First operand 3308 states and 11614 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:08,490 INFO L93 Difference]: Finished difference Result 6241 states and 20184 transitions. [2021-06-05 16:38:08,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:38:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:08,499 INFO L225 Difference]: With dead ends: 6241 [2021-06-05 16:38:08,499 INFO L226 Difference]: Without dead ends: 6237 [2021-06-05 16:38:08,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:38:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-06-05 16:38:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 3068. [2021-06-05 16:38:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3068 states, 3067 states have (on average 3.53635474404956) internal successors, (10846), 3067 states have internal predecessors, (10846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:08,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3068 states to 3068 states and 10846 transitions. [2021-06-05 16:38:08,560 INFO L78 Accepts]: Start accepts. Automaton has 3068 states and 10846 transitions. Word has length 28 [2021-06-05 16:38:08,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:08,560 INFO L482 AbstractCegarLoop]: Abstraction has 3068 states and 10846 transitions. [2021-06-05 16:38:08,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:08,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3068 states and 10846 transitions. [2021-06-05 16:38:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:08,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:08,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:08,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-06-05 16:38:08,764 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:08,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 72 times [2021-06-05 16:38:08,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:08,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844811822] [2021-06-05 16:38:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:08,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:08,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:08,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844811822] [2021-06-05 16:38:08,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844811822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:08,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618554137] [2021-06-05 16:38:08,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:08,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:08,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618554137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:08,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:08,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:38:08,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507252453] [2021-06-05 16:38:08,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:08,915 INFO L87 Difference]: Start difference. First operand 3068 states and 10846 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:09,935 INFO L93 Difference]: Finished difference Result 9481 states and 30975 transitions. [2021-06-05 16:38:09,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:38:09,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:09,950 INFO L225 Difference]: With dead ends: 9481 [2021-06-05 16:38:09,950 INFO L226 Difference]: Without dead ends: 9481 [2021-06-05 16:38:09,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:38:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9481 states. [2021-06-05 16:38:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9481 to 3244. [2021-06-05 16:38:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3243 states have (on average 3.602836879432624) internal successors, (11684), 3243 states have internal predecessors, (11684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 11684 transitions. [2021-06-05 16:38:10,040 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 11684 transitions. Word has length 28 [2021-06-05 16:38:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:10,040 INFO L482 AbstractCegarLoop]: Abstraction has 3244 states and 11684 transitions. [2021-06-05 16:38:10,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 11684 transitions. [2021-06-05 16:38:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:10,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:10,044 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:10,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-06-05 16:38:10,244 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 73 times [2021-06-05 16:38:10,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:10,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153745608] [2021-06-05 16:38:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:10,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:10,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153745608] [2021-06-05 16:38:10,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153745608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:10,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221718992] [2021-06-05 16:38:10,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:10,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:10,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221718992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:10,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:10,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:38:10,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559246758] [2021-06-05 16:38:10,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:10,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:10,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:10,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:10,394 INFO L87 Difference]: Start difference. First operand 3244 states and 11684 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:11,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:11,392 INFO L93 Difference]: Finished difference Result 9310 states and 30510 transitions. [2021-06-05 16:38:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:38:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:11,406 INFO L225 Difference]: With dead ends: 9310 [2021-06-05 16:38:11,406 INFO L226 Difference]: Without dead ends: 9310 [2021-06-05 16:38:11,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:38:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2021-06-05 16:38:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 3216. [2021-06-05 16:38:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5878693623639193) internal successors, (11535), 3215 states have internal predecessors, (11535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11535 transitions. [2021-06-05 16:38:11,496 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11535 transitions. Word has length 28 [2021-06-05 16:38:11,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:11,496 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11535 transitions. [2021-06-05 16:38:11,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11535 transitions. [2021-06-05 16:38:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:11,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:11,500 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:11,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:11,700 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 74 times [2021-06-05 16:38:11,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:11,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378289341] [2021-06-05 16:38:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:11,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378289341] [2021-06-05 16:38:11,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378289341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997047188] [2021-06-05 16:38:11,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:11,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:11,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:11,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997047188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:11,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:11,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:38:11,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686785272] [2021-06-05 16:38:11,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:11,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:11,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:11,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:11,840 INFO L87 Difference]: Start difference. First operand 3216 states and 11535 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:12,778 INFO L93 Difference]: Finished difference Result 8753 states and 27774 transitions. [2021-06-05 16:38:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:38:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:12,791 INFO L225 Difference]: With dead ends: 8753 [2021-06-05 16:38:12,792 INFO L226 Difference]: Without dead ends: 8753 [2021-06-05 16:38:12,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:38:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-06-05 16:38:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 3236. [2021-06-05 16:38:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 3.591035548686244) internal successors, (11617), 3235 states have internal predecessors, (11617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 11617 transitions. [2021-06-05 16:38:12,873 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 11617 transitions. Word has length 28 [2021-06-05 16:38:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:12,873 INFO L482 AbstractCegarLoop]: Abstraction has 3236 states and 11617 transitions. [2021-06-05 16:38:12,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 11617 transitions. [2021-06-05 16:38:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:12,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:12,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:13,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4037,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:13,077 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:13,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 75 times [2021-06-05 16:38:13,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:13,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444160665] [2021-06-05 16:38:13,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:13,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:13,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444160665] [2021-06-05 16:38:13,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444160665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:13,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263281212] [2021-06-05 16:38:13,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:38:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:13,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263281212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:13,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:13,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:38:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437692034] [2021-06-05 16:38:13,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:13,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:13,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:13,232 INFO L87 Difference]: Start difference. First operand 3236 states and 11617 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:14,110 INFO L93 Difference]: Finished difference Result 8265 states and 26591 transitions. [2021-06-05 16:38:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:38:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:14,123 INFO L225 Difference]: With dead ends: 8265 [2021-06-05 16:38:14,123 INFO L226 Difference]: Without dead ends: 8257 [2021-06-05 16:38:14,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:38:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-06-05 16:38:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 3218. [2021-06-05 16:38:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 3.5871930369909855) internal successors, (11540), 3217 states have internal predecessors, (11540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 11540 transitions. [2021-06-05 16:38:14,205 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 11540 transitions. Word has length 28 [2021-06-05 16:38:14,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:14,205 INFO L482 AbstractCegarLoop]: Abstraction has 3218 states and 11540 transitions. [2021-06-05 16:38:14,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 11540 transitions. [2021-06-05 16:38:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:14,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:14,209 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:14,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4038,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:14,409 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 76 times [2021-06-05 16:38:14,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:14,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212194448] [2021-06-05 16:38:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:14,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212194448] [2021-06-05 16:38:14,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212194448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:14,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625091615] [2021-06-05 16:38:14,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:14,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:14,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625091615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:14,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:14,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:38:14,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102580211] [2021-06-05 16:38:14,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:14,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:14,560 INFO L87 Difference]: Start difference. First operand 3218 states and 11540 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:15,497 INFO L93 Difference]: Finished difference Result 8190 states and 26354 transitions. [2021-06-05 16:38:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 16:38:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:15,509 INFO L225 Difference]: With dead ends: 8190 [2021-06-05 16:38:15,509 INFO L226 Difference]: Without dead ends: 8190 [2021-06-05 16:38:15,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:38:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2021-06-05 16:38:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 3234. [2021-06-05 16:38:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 3.589236003711723) internal successors, (11604), 3233 states have internal predecessors, (11604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 11604 transitions. [2021-06-05 16:38:15,584 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 11604 transitions. Word has length 28 [2021-06-05 16:38:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:15,584 INFO L482 AbstractCegarLoop]: Abstraction has 3234 states and 11604 transitions. [2021-06-05 16:38:15,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 11604 transitions. [2021-06-05 16:38:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:15,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:15,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:15,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:15,789 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:15,789 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 77 times [2021-06-05 16:38:15,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:15,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963333599] [2021-06-05 16:38:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:15,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963333599] [2021-06-05 16:38:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963333599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010636073] [2021-06-05 16:38:15,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:15,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 16:38:15,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:15,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010636073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:15,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:15,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:38:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912415154] [2021-06-05 16:38:15,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:15,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:15,956 INFO L87 Difference]: Start difference. First operand 3234 states and 11604 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:16,865 INFO L93 Difference]: Finished difference Result 7851 states and 25552 transitions. [2021-06-05 16:38:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:38:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:16,878 INFO L225 Difference]: With dead ends: 7851 [2021-06-05 16:38:16,878 INFO L226 Difference]: Without dead ends: 7843 [2021-06-05 16:38:16,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:38:16,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7843 states. [2021-06-05 16:38:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7843 to 2991. [2021-06-05 16:38:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.5123745819397993) internal successors, (10502), 2990 states have internal predecessors, (10502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 10502 transitions. [2021-06-05 16:38:16,956 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 10502 transitions. Word has length 28 [2021-06-05 16:38:16,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:16,956 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 10502 transitions. [2021-06-05 16:38:16,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 10502 transitions. [2021-06-05 16:38:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:16,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:16,960 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:17,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4040 [2021-06-05 16:38:17,161 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 78 times [2021-06-05 16:38:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:17,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301396508] [2021-06-05 16:38:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:17,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:17,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301396508] [2021-06-05 16:38:17,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301396508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:17,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516674969] [2021-06-05 16:38:17,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:17,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:38:17,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:17,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516674969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:17,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:17,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:38:17,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209511654] [2021-06-05 16:38:17,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:17,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:17,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:17,418 INFO L87 Difference]: Start difference. First operand 2991 states and 10502 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:18,283 INFO L93 Difference]: Finished difference Result 6061 states and 19474 transitions. [2021-06-05 16:38:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:38:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:18,292 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 16:38:18,293 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 16:38:18,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:38:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 16:38:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 3003. [2021-06-05 16:38:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.5109926715522985) internal successors, (10540), 3002 states have internal predecessors, (10540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10540 transitions. [2021-06-05 16:38:18,354 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10540 transitions. Word has length 28 [2021-06-05 16:38:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:18,354 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10540 transitions. [2021-06-05 16:38:18,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10540 transitions. [2021-06-05 16:38:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:18,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:18,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:18,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4041 [2021-06-05 16:38:18,558 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 79 times [2021-06-05 16:38:18,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:18,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208150378] [2021-06-05 16:38:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:18,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208150378] [2021-06-05 16:38:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208150378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662731959] [2021-06-05 16:38:18,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:18,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:18,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662731959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:18,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:18,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:18,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150671756] [2021-06-05 16:38:18,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:18,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:18,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:18,729 INFO L87 Difference]: Start difference. First operand 3003 states and 10540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:19,813 INFO L93 Difference]: Finished difference Result 6857 states and 21507 transitions. [2021-06-05 16:38:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:38:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:19,823 INFO L225 Difference]: With dead ends: 6857 [2021-06-05 16:38:19,823 INFO L226 Difference]: Without dead ends: 6857 [2021-06-05 16:38:19,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 688.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:38:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2021-06-05 16:38:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 3069. [2021-06-05 16:38:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 3068 states have (on average 3.50619295958279) internal successors, (10757), 3068 states have internal predecessors, (10757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 10757 transitions. [2021-06-05 16:38:19,885 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 10757 transitions. Word has length 28 [2021-06-05 16:38:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:19,885 INFO L482 AbstractCegarLoop]: Abstraction has 3069 states and 10757 transitions. [2021-06-05 16:38:19,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 10757 transitions. [2021-06-05 16:38:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:19,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:19,889 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:20,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4042,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:20,093 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 80 times [2021-06-05 16:38:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:20,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490093648] [2021-06-05 16:38:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:20,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:20,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490093648] [2021-06-05 16:38:20,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490093648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:20,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004505404] [2021-06-05 16:38:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:20,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:20,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:20,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004505404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:20,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:20,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:20,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072137662] [2021-06-05 16:38:20,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:20,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:20,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:20,248 INFO L87 Difference]: Start difference. First operand 3069 states and 10757 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:21,249 INFO L93 Difference]: Finished difference Result 6397 states and 20307 transitions. [2021-06-05 16:38:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:38:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:21,260 INFO L225 Difference]: With dead ends: 6397 [2021-06-05 16:38:21,260 INFO L226 Difference]: Without dead ends: 6393 [2021-06-05 16:38:21,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:38:21,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6393 states. [2021-06-05 16:38:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6393 to 2995. [2021-06-05 16:38:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.502672010688043) internal successors, (10487), 2994 states have internal predecessors, (10487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10487 transitions. [2021-06-05 16:38:21,329 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10487 transitions. Word has length 28 [2021-06-05 16:38:21,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:21,329 INFO L482 AbstractCegarLoop]: Abstraction has 2995 states and 10487 transitions. [2021-06-05 16:38:21,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10487 transitions. [2021-06-05 16:38:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:21,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:21,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 16:38:21,552 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 65 times [2021-06-05 16:38:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723791163] [2021-06-05 16:38:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:21,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:21,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723791163] [2021-06-05 16:38:21,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723791163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:21,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435012643] [2021-06-05 16:38:21,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:21,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:38:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:21,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435012643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:21,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:21,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:21,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729535951] [2021-06-05 16:38:21,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:21,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:21,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:21,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:21,690 INFO L87 Difference]: Start difference. First operand 2995 states and 10487 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:22,243 INFO L93 Difference]: Finished difference Result 5524 states and 17848 transitions. [2021-06-05 16:38:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:38:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:22,251 INFO L225 Difference]: With dead ends: 5524 [2021-06-05 16:38:22,252 INFO L226 Difference]: Without dead ends: 5524 [2021-06-05 16:38:22,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:38:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-06-05 16:38:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 2995. [2021-06-05 16:38:22,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2995 states, 2994 states have (on average 3.5046760187040746) internal successors, (10493), 2994 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2995 states to 2995 states and 10493 transitions. [2021-06-05 16:38:22,308 INFO L78 Accepts]: Start accepts. Automaton has 2995 states and 10493 transitions. Word has length 28 [2021-06-05 16:38:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:22,308 INFO L482 AbstractCegarLoop]: Abstraction has 2995 states and 10493 transitions. [2021-06-05 16:38:22,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2995 states and 10493 transitions. [2021-06-05 16:38:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:22,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:22,312 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:22,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4044 [2021-06-05 16:38:22,512 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 66 times [2021-06-05 16:38:22,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:22,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066450617] [2021-06-05 16:38:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:22,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066450617] [2021-06-05 16:38:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066450617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219671310] [2021-06-05 16:38:22,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:22,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:22,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219671310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:22,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:22,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983909793] [2021-06-05 16:38:22,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:22,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:22,653 INFO L87 Difference]: Start difference. First operand 2995 states and 10493 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:23,410 INFO L93 Difference]: Finished difference Result 5876 states and 18839 transitions. [2021-06-05 16:38:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:38:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:23,418 INFO L225 Difference]: With dead ends: 5876 [2021-06-05 16:38:23,418 INFO L226 Difference]: Without dead ends: 5876 [2021-06-05 16:38:23,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:38:23,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5876 states. [2021-06-05 16:38:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5876 to 2986. [2021-06-05 16:38:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.504857621440536) internal successors, (10462), 2985 states have internal predecessors, (10462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 10462 transitions. [2021-06-05 16:38:23,493 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 10462 transitions. Word has length 28 [2021-06-05 16:38:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:23,493 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 10462 transitions. [2021-06-05 16:38:23,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 10462 transitions. [2021-06-05 16:38:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:23,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:23,496 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:23,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4045 [2021-06-05 16:38:23,697 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 67 times [2021-06-05 16:38:23,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:23,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111945286] [2021-06-05 16:38:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:23,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:23,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111945286] [2021-06-05 16:38:23,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111945286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:23,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137620250] [2021-06-05 16:38:23,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:23,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:23,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137620250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:23,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:23,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:23,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108590668] [2021-06-05 16:38:23,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:23,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:23,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:23,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:23,835 INFO L87 Difference]: Start difference. First operand 2986 states and 10462 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:24,648 INFO L93 Difference]: Finished difference Result 6350 states and 20120 transitions. [2021-06-05 16:38:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 16:38:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:24,658 INFO L225 Difference]: With dead ends: 6350 [2021-06-05 16:38:24,658 INFO L226 Difference]: Without dead ends: 6350 [2021-06-05 16:38:24,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 496.9ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:38:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-06-05 16:38:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 3046. [2021-06-05 16:38:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3046 states, 3045 states have (on average 3.5008210180623975) internal successors, (10660), 3045 states have internal predecessors, (10660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3046 states to 3046 states and 10660 transitions. [2021-06-05 16:38:24,718 INFO L78 Accepts]: Start accepts. Automaton has 3046 states and 10660 transitions. Word has length 28 [2021-06-05 16:38:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:24,718 INFO L482 AbstractCegarLoop]: Abstraction has 3046 states and 10660 transitions. [2021-06-05 16:38:24,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3046 states and 10660 transitions. [2021-06-05 16:38:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:24,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:24,721 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:24,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4046 [2021-06-05 16:38:24,922 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:24,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 68 times [2021-06-05 16:38:24,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:24,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39529648] [2021-06-05 16:38:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:24,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:24,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39529648] [2021-06-05 16:38:24,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39529648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:24,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839431319] [2021-06-05 16:38:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:24,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:24,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:24,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:25,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839431319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:25,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:25,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:38:25,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232892940] [2021-06-05 16:38:25,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:25,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:25,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:25,081 INFO L87 Difference]: Start difference. First operand 3046 states and 10660 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:25,612 INFO L93 Difference]: Finished difference Result 7170 states and 24220 transitions. [2021-06-05 16:38:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:38:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:25,647 INFO L225 Difference]: With dead ends: 7170 [2021-06-05 16:38:25,648 INFO L226 Difference]: Without dead ends: 7170 [2021-06-05 16:38:25,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:38:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7170 states. [2021-06-05 16:38:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7170 to 4145. [2021-06-05 16:38:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 3.618484555984556) internal successors, (14995), 4144 states have internal predecessors, (14995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 14995 transitions. [2021-06-05 16:38:25,723 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 14995 transitions. Word has length 28 [2021-06-05 16:38:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:25,723 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 14995 transitions. [2021-06-05 16:38:25,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 14995 transitions. [2021-06-05 16:38:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:25,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:25,728 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:25,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4047,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:25,929 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 69 times [2021-06-05 16:38:25,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:25,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109359195] [2021-06-05 16:38:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:25,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:25,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109359195] [2021-06-05 16:38:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109359195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:25,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927268391] [2021-06-05 16:38:25,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:25,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:38:25,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:25,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:26,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927268391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:26,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:26,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:38:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241457353] [2021-06-05 16:38:26,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:26,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:26,065 INFO L87 Difference]: Start difference. First operand 4145 states and 14995 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:26,859 INFO L93 Difference]: Finished difference Result 7513 states and 25430 transitions. [2021-06-05 16:38:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:38:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:26,871 INFO L225 Difference]: With dead ends: 7513 [2021-06-05 16:38:26,871 INFO L226 Difference]: Without dead ends: 7509 [2021-06-05 16:38:26,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:38:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-06-05 16:38:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 4037. [2021-06-05 16:38:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4037 states, 4036 states have (on average 3.627601585728444) internal successors, (14641), 4036 states have internal predecessors, (14641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4037 states to 4037 states and 14641 transitions. [2021-06-05 16:38:26,952 INFO L78 Accepts]: Start accepts. Automaton has 4037 states and 14641 transitions. Word has length 28 [2021-06-05 16:38:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:26,952 INFO L482 AbstractCegarLoop]: Abstraction has 4037 states and 14641 transitions. [2021-06-05 16:38:26,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4037 states and 14641 transitions. [2021-06-05 16:38:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:26,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:26,957 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:27,158 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 81 times [2021-06-05 16:38:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:27,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293612686] [2021-06-05 16:38:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:27,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:27,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293612686] [2021-06-05 16:38:27,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293612686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:27,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650177304] [2021-06-05 16:38:27,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:27,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:38:27,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:27,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650177304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:27,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:27,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:38:27,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315845125] [2021-06-05 16:38:27,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:27,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:27,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:27,293 INFO L87 Difference]: Start difference. First operand 4037 states and 14641 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:28,129 INFO L93 Difference]: Finished difference Result 8340 states and 27997 transitions. [2021-06-05 16:38:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:38:28,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:28,142 INFO L225 Difference]: With dead ends: 8340 [2021-06-05 16:38:28,142 INFO L226 Difference]: Without dead ends: 8331 [2021-06-05 16:38:28,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:38:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8331 states. [2021-06-05 16:38:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8331 to 4477. [2021-06-05 16:38:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 3.7155942806076854) internal successors, (16631), 4476 states have internal predecessors, (16631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 16631 transitions. [2021-06-05 16:38:28,233 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 16631 transitions. Word has length 28 [2021-06-05 16:38:28,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:28,234 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 16631 transitions. [2021-06-05 16:38:28,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 16631 transitions. [2021-06-05 16:38:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:28,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:28,239 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:28,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:28,440 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 82 times [2021-06-05 16:38:28,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:28,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615551319] [2021-06-05 16:38:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:28,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:28,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615551319] [2021-06-05 16:38:28,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615551319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:28,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547873895] [2021-06-05 16:38:28,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:28,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:28,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:28,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547873895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:28,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:28,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:38:28,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024809495] [2021-06-05 16:38:28,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:28,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:28,574 INFO L87 Difference]: Start difference. First operand 4477 states and 16631 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:29,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:29,334 INFO L93 Difference]: Finished difference Result 8630 states and 28901 transitions. [2021-06-05 16:38:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:38:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:29,347 INFO L225 Difference]: With dead ends: 8630 [2021-06-05 16:38:29,347 INFO L226 Difference]: Without dead ends: 8630 [2021-06-05 16:38:29,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:38:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8630 states. [2021-06-05 16:38:29,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8630 to 4491. [2021-06-05 16:38:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 3.7028953229398662) internal successors, (16626), 4490 states have internal predecessors, (16626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 16626 transitions. [2021-06-05 16:38:29,462 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 16626 transitions. Word has length 28 [2021-06-05 16:38:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:29,462 INFO L482 AbstractCegarLoop]: Abstraction has 4491 states and 16626 transitions. [2021-06-05 16:38:29,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 16626 transitions. [2021-06-05 16:38:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:29,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:29,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:29,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4050 [2021-06-05 16:38:29,668 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:29,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 83 times [2021-06-05 16:38:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:29,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712094372] [2021-06-05 16:38:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:29,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:29,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712094372] [2021-06-05 16:38:29,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712094372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:29,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075361656] [2021-06-05 16:38:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:29,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:38:29,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:29,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:29,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075361656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:29,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:29,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:38:29,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986724786] [2021-06-05 16:38:29,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:38:29,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:29,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:38:29,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:38:29,784 INFO L87 Difference]: Start difference. First operand 4491 states and 16626 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:30,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:30,192 INFO L93 Difference]: Finished difference Result 8035 states and 28348 transitions. [2021-06-05 16:38:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:38:30,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:30,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:30,206 INFO L225 Difference]: With dead ends: 8035 [2021-06-05 16:38:30,206 INFO L226 Difference]: Without dead ends: 7938 [2021-06-05 16:38:30,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:38:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7938 states. [2021-06-05 16:38:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7938 to 5963. [2021-06-05 16:38:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5963 states, 5962 states have (on average 3.763837638376384) internal successors, (22440), 5962 states have internal predecessors, (22440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 22440 transitions. [2021-06-05 16:38:30,308 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 22440 transitions. Word has length 28 [2021-06-05 16:38:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:30,308 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 22440 transitions. [2021-06-05 16:38:30,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 22440 transitions. [2021-06-05 16:38:30,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:30,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:30,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:30,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4051,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:30,517 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 84 times [2021-06-05 16:38:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:30,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845696916] [2021-06-05 16:38:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:30,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:30,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845696916] [2021-06-05 16:38:30,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845696916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:30,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597468409] [2021-06-05 16:38:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:30,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:30,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:38:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:30,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597468409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:30,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:30,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:38:30,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524593380] [2021-06-05 16:38:30,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:38:30,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:30,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:38:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:38:30,621 INFO L87 Difference]: Start difference. First operand 5963 states and 22440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:30,796 INFO L93 Difference]: Finished difference Result 8287 states and 29195 transitions. [2021-06-05 16:38:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:38:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:30,811 INFO L225 Difference]: With dead ends: 8287 [2021-06-05 16:38:30,811 INFO L226 Difference]: Without dead ends: 8287 [2021-06-05 16:38:30,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:38:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2021-06-05 16:38:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 6088. [2021-06-05 16:38:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6088 states, 6087 states have (on average 3.741416132741909) internal successors, (22774), 6087 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6088 states to 6088 states and 22774 transitions. [2021-06-05 16:38:30,917 INFO L78 Accepts]: Start accepts. Automaton has 6088 states and 22774 transitions. Word has length 28 [2021-06-05 16:38:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:30,917 INFO L482 AbstractCegarLoop]: Abstraction has 6088 states and 22774 transitions. [2021-06-05 16:38:30,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6088 states and 22774 transitions. [2021-06-05 16:38:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:30,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:30,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:31,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:31,126 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 85 times [2021-06-05 16:38:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:31,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994749130] [2021-06-05 16:38:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:31,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994749130] [2021-06-05 16:38:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994749130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811414163] [2021-06-05 16:38:31,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:31,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811414163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:31,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:31,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:38:31,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842002016] [2021-06-05 16:38:31,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:31,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:31,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:31,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:31,291 INFO L87 Difference]: Start difference. First operand 6088 states and 22774 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:32,014 INFO L93 Difference]: Finished difference Result 12628 states and 43945 transitions. [2021-06-05 16:38:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 16:38:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:32,037 INFO L225 Difference]: With dead ends: 12628 [2021-06-05 16:38:32,037 INFO L226 Difference]: Without dead ends: 12628 [2021-06-05 16:38:32,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:38:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12628 states. [2021-06-05 16:38:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12628 to 6761. [2021-06-05 16:38:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6761 states, 6760 states have (on average 3.7547337278106507) internal successors, (25382), 6760 states have internal predecessors, (25382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6761 states to 6761 states and 25382 transitions. [2021-06-05 16:38:32,177 INFO L78 Accepts]: Start accepts. Automaton has 6761 states and 25382 transitions. Word has length 28 [2021-06-05 16:38:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:32,177 INFO L482 AbstractCegarLoop]: Abstraction has 6761 states and 25382 transitions. [2021-06-05 16:38:32,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6761 states and 25382 transitions. [2021-06-05 16:38:32,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:32,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:32,186 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:32,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 16:38:32,386 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 86 times [2021-06-05 16:38:32,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:32,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711955481] [2021-06-05 16:38:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:32,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:32,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711955481] [2021-06-05 16:38:32,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711955481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:32,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138817000] [2021-06-05 16:38:32,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:32,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:32,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:32,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:32,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138817000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:32,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:32,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:38:32,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878130147] [2021-06-05 16:38:32,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:38:32,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:32,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:38:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:38:32,522 INFO L87 Difference]: Start difference. First operand 6761 states and 25382 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:33,187 INFO L93 Difference]: Finished difference Result 12791 states and 44537 transitions. [2021-06-05 16:38:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:38:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:33,209 INFO L225 Difference]: With dead ends: 12791 [2021-06-05 16:38:33,210 INFO L226 Difference]: Without dead ends: 12791 [2021-06-05 16:38:33,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:38:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12791 states. [2021-06-05 16:38:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12791 to 6999. [2021-06-05 16:38:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6999 states, 6998 states have (on average 3.734352672192055) internal successors, (26133), 6998 states have internal predecessors, (26133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:33,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6999 states to 6999 states and 26133 transitions. [2021-06-05 16:38:33,385 INFO L78 Accepts]: Start accepts. Automaton has 6999 states and 26133 transitions. Word has length 28 [2021-06-05 16:38:33,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:33,386 INFO L482 AbstractCegarLoop]: Abstraction has 6999 states and 26133 transitions. [2021-06-05 16:38:33,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:33,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6999 states and 26133 transitions. [2021-06-05 16:38:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:33,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:33,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:33,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4054,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:33,597 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 87 times [2021-06-05 16:38:33,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:33,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114732044] [2021-06-05 16:38:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:33,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114732044] [2021-06-05 16:38:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114732044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778031056] [2021-06-05 16:38:33,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:33,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:38:33,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:33,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 16:38:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:33,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778031056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:33,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:33,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 16:38:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666466926] [2021-06-05 16:38:33,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:33,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:33,751 INFO L87 Difference]: Start difference. First operand 6999 states and 26133 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:34,497 INFO L93 Difference]: Finished difference Result 9904 states and 35142 transitions. [2021-06-05 16:38:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:38:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:34,515 INFO L225 Difference]: With dead ends: 9904 [2021-06-05 16:38:34,515 INFO L226 Difference]: Without dead ends: 9816 [2021-06-05 16:38:34,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=534, Invalid=1916, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:38:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-06-05 16:38:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7496. [2021-06-05 16:38:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7496 states, 7495 states have (on average 3.741160773849233) internal successors, (28040), 7495 states have internal predecessors, (28040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7496 states to 7496 states and 28040 transitions. [2021-06-05 16:38:34,698 INFO L78 Accepts]: Start accepts. Automaton has 7496 states and 28040 transitions. Word has length 28 [2021-06-05 16:38:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:34,698 INFO L482 AbstractCegarLoop]: Abstraction has 7496 states and 28040 transitions. [2021-06-05 16:38:34,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7496 states and 28040 transitions. [2021-06-05 16:38:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:34,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:34,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:34,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4055 [2021-06-05 16:38:34,909 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 88 times [2021-06-05 16:38:34,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:34,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325297702] [2021-06-05 16:38:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:34,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:34,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325297702] [2021-06-05 16:38:34,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325297702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:34,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630033772] [2021-06-05 16:38:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:34,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:34,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:34,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:35,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630033772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:35,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:35,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:38:35,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406318089] [2021-06-05 16:38:35,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:38:35,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:38:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:38:35,029 INFO L87 Difference]: Start difference. First operand 7496 states and 28040 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:35,373 INFO L93 Difference]: Finished difference Result 11192 states and 39947 transitions. [2021-06-05 16:38:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:38:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:35,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:35,393 INFO L225 Difference]: With dead ends: 11192 [2021-06-05 16:38:35,393 INFO L226 Difference]: Without dead ends: 11192 [2021-06-05 16:38:35,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:38:35,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11192 states. [2021-06-05 16:38:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11192 to 8528. [2021-06-05 16:38:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8528 states, 8527 states have (on average 3.7686173331769672) internal successors, (32135), 8527 states have internal predecessors, (32135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8528 states to 8528 states and 32135 transitions. [2021-06-05 16:38:35,559 INFO L78 Accepts]: Start accepts. Automaton has 8528 states and 32135 transitions. Word has length 28 [2021-06-05 16:38:35,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:35,559 INFO L482 AbstractCegarLoop]: Abstraction has 8528 states and 32135 transitions. [2021-06-05 16:38:35,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 8528 states and 32135 transitions. [2021-06-05 16:38:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:35,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:35,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:35,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-06-05 16:38:35,772 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 89 times [2021-06-05 16:38:35,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:35,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554674354] [2021-06-05 16:38:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:35,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:35,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554674354] [2021-06-05 16:38:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554674354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:35,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698410228] [2021-06-05 16:38:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:35,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:38:35,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:35,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:35,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698410228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:35,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:35,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 16:38:35,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9698606] [2021-06-05 16:38:35,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:38:35,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:38:35,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:38:35,889 INFO L87 Difference]: Start difference. First operand 8528 states and 32135 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:36,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:36,488 INFO L93 Difference]: Finished difference Result 14252 states and 50831 transitions. [2021-06-05 16:38:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:38:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:36,515 INFO L225 Difference]: With dead ends: 14252 [2021-06-05 16:38:36,515 INFO L226 Difference]: Without dead ends: 14248 [2021-06-05 16:38:36,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:38:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14248 states. [2021-06-05 16:38:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14248 to 8428. [2021-06-05 16:38:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8428 states, 8427 states have (on average 3.77251690993236) internal successors, (31791), 8427 states have internal predecessors, (31791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8428 states to 8428 states and 31791 transitions. [2021-06-05 16:38:36,748 INFO L78 Accepts]: Start accepts. Automaton has 8428 states and 31791 transitions. Word has length 28 [2021-06-05 16:38:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:36,748 INFO L482 AbstractCegarLoop]: Abstraction has 8428 states and 31791 transitions. [2021-06-05 16:38:36,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 8428 states and 31791 transitions. [2021-06-05 16:38:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:36,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:36,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:36,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 16:38:36,961 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 90 times [2021-06-05 16:38:36,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:36,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347259717] [2021-06-05 16:38:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:36,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:36,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347259717] [2021-06-05 16:38:36,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347259717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:36,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213993768] [2021-06-05 16:38:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:37,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:38:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:38:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:37,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213993768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:37,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:37,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:38:37,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744027765] [2021-06-05 16:38:37,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:38:37,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:38:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:38:37,082 INFO L87 Difference]: Start difference. First operand 8428 states and 31791 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:37,503 INFO L93 Difference]: Finished difference Result 11465 states and 40959 transitions. [2021-06-05 16:38:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:38:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:37,524 INFO L225 Difference]: With dead ends: 11465 [2021-06-05 16:38:37,524 INFO L226 Difference]: Without dead ends: 11465 [2021-06-05 16:38:37,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:38:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11465 states. [2021-06-05 16:38:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11465 to 8331. [2021-06-05 16:38:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.768667466986795) internal successors, (31393), 8330 states have internal predecessors, (31393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31393 transitions. [2021-06-05 16:38:37,681 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31393 transitions. Word has length 28 [2021-06-05 16:38:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:37,681 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31393 transitions. [2021-06-05 16:38:37,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31393 transitions. [2021-06-05 16:38:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:37,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:37,693 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:37,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4058,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:37,893 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 91 times [2021-06-05 16:38:37,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:37,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600136615] [2021-06-05 16:38:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:37,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600136615] [2021-06-05 16:38:37,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600136615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:37,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52906663] [2021-06-05 16:38:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:37,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:38,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52906663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:38,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:38,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:38:38,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351667910] [2021-06-05 16:38:38,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:38:38,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:38:38,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:38:38,015 INFO L87 Difference]: Start difference. First operand 8331 states and 31393 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:38,702 INFO L93 Difference]: Finished difference Result 14086 states and 50169 transitions. [2021-06-05 16:38:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:38:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:38,729 INFO L225 Difference]: With dead ends: 14086 [2021-06-05 16:38:38,729 INFO L226 Difference]: Without dead ends: 14074 [2021-06-05 16:38:38,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:38:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-06-05 16:38:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 8331. [2021-06-05 16:38:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 3.768187274909964) internal successors, (31389), 8330 states have internal predecessors, (31389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 31389 transitions. [2021-06-05 16:38:38,910 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 31389 transitions. Word has length 28 [2021-06-05 16:38:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:38,910 INFO L482 AbstractCegarLoop]: Abstraction has 8331 states and 31389 transitions. [2021-06-05 16:38:38,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 31389 transitions. [2021-06-05 16:38:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:38,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:38,922 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:39,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4059,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:39,125 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 92 times [2021-06-05 16:38:39,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:39,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453081266] [2021-06-05 16:38:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:39,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:39,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453081266] [2021-06-05 16:38:39,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453081266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:39,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363074334] [2021-06-05 16:38:39,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:39,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:39,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:39,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:39,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:39,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363074334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:39,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:39,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:38:39,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963026815] [2021-06-05 16:38:39,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:39,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:39,260 INFO L87 Difference]: Start difference. First operand 8331 states and 31389 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:40,452 INFO L93 Difference]: Finished difference Result 21250 states and 74521 transitions. [2021-06-05 16:38:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 16:38:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:40,488 INFO L225 Difference]: With dead ends: 21250 [2021-06-05 16:38:40,489 INFO L226 Difference]: Without dead ends: 21250 [2021-06-05 16:38:40,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 699.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 16:38:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21250 states. [2021-06-05 16:38:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21250 to 11363. [2021-06-05 16:38:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11363 states, 11362 states have (on average 3.808924485125858) internal successors, (43277), 11362 states have internal predecessors, (43277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 43277 transitions. [2021-06-05 16:38:40,781 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 43277 transitions. Word has length 28 [2021-06-05 16:38:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:40,781 INFO L482 AbstractCegarLoop]: Abstraction has 11363 states and 43277 transitions. [2021-06-05 16:38:40,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 43277 transitions. [2021-06-05 16:38:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:40,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:40,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:40,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4060,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:40,998 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:40,998 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 93 times [2021-06-05 16:38:40,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:40,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960376294] [2021-06-05 16:38:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:41,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:41,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960376294] [2021-06-05 16:38:41,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960376294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:41,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836154454] [2021-06-05 16:38:41,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:41,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:38:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:41,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:41,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836154454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:41,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:41,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:38:41,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478769429] [2021-06-05 16:38:41,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:41,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:41,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:41,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:41,127 INFO L87 Difference]: Start difference. First operand 11363 states and 43277 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:42,191 INFO L93 Difference]: Finished difference Result 20481 states and 72514 transitions. [2021-06-05 16:38:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:38:42,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:42,231 INFO L225 Difference]: With dead ends: 20481 [2021-06-05 16:38:42,232 INFO L226 Difference]: Without dead ends: 20469 [2021-06-05 16:38:42,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:38:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20469 states. [2021-06-05 16:38:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20469 to 11177. [2021-06-05 16:38:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11177 states, 11176 states have (on average 3.815139584824624) internal successors, (42638), 11176 states have internal predecessors, (42638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:42,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11177 states to 11177 states and 42638 transitions. [2021-06-05 16:38:42,572 INFO L78 Accepts]: Start accepts. Automaton has 11177 states and 42638 transitions. Word has length 28 [2021-06-05 16:38:42,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:42,572 INFO L482 AbstractCegarLoop]: Abstraction has 11177 states and 42638 transitions. [2021-06-05 16:38:42,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:42,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11177 states and 42638 transitions. [2021-06-05 16:38:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:42,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:42,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:42,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:42,788 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 94 times [2021-06-05 16:38:42,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:42,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514655557] [2021-06-05 16:38:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:42,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:42,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514655557] [2021-06-05 16:38:42,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514655557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283921383] [2021-06-05 16:38:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:42,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:42,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:42,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283921383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:42,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:42,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:38:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155473103] [2021-06-05 16:38:42,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:38:42,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:38:42,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:38:42,918 INFO L87 Difference]: Start difference. First operand 11177 states and 42638 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:43,923 INFO L93 Difference]: Finished difference Result 20316 states and 71936 transitions. [2021-06-05 16:38:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:38:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:43,962 INFO L225 Difference]: With dead ends: 20316 [2021-06-05 16:38:43,962 INFO L226 Difference]: Without dead ends: 20280 [2021-06-05 16:38:43,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:38:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20280 states. [2021-06-05 16:38:44,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20280 to 11229. [2021-06-05 16:38:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11229 states, 11228 states have (on average 3.813323833273958) internal successors, (42816), 11228 states have internal predecessors, (42816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 42816 transitions. [2021-06-05 16:38:44,300 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 42816 transitions. Word has length 28 [2021-06-05 16:38:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:44,300 INFO L482 AbstractCegarLoop]: Abstraction has 11229 states and 42816 transitions. [2021-06-05 16:38:44,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 42816 transitions. [2021-06-05 16:38:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:44,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:44,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:44,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4062 [2021-06-05 16:38:44,517 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 95 times [2021-06-05 16:38:44,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:44,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528464071] [2021-06-05 16:38:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:44,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:44,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528464071] [2021-06-05 16:38:44,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528464071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:44,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614013038] [2021-06-05 16:38:44,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:44,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:38:44,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:44,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:44,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614013038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:44,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:44,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:38:44,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586955435] [2021-06-05 16:38:44,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:44,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:44,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:44,673 INFO L87 Difference]: Start difference. First operand 11229 states and 42816 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:46,017 INFO L93 Difference]: Finished difference Result 20201 states and 71663 transitions. [2021-06-05 16:38:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:38:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:46,055 INFO L225 Difference]: With dead ends: 20201 [2021-06-05 16:38:46,056 INFO L226 Difference]: Without dead ends: 20201 [2021-06-05 16:38:46,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:38:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20201 states. [2021-06-05 16:38:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20201 to 11425. [2021-06-05 16:38:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11425 states, 11424 states have (on average 3.804796918767507) internal successors, (43466), 11424 states have internal predecessors, (43466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11425 states to 11425 states and 43466 transitions. [2021-06-05 16:38:46,405 INFO L78 Accepts]: Start accepts. Automaton has 11425 states and 43466 transitions. Word has length 28 [2021-06-05 16:38:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:46,405 INFO L482 AbstractCegarLoop]: Abstraction has 11425 states and 43466 transitions. [2021-06-05 16:38:46,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 11425 states and 43466 transitions. [2021-06-05 16:38:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:46,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:46,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:46,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-06-05 16:38:46,622 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 96 times [2021-06-05 16:38:46,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:46,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981994131] [2021-06-05 16:38:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:46,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:46,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981994131] [2021-06-05 16:38:46,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981994131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:46,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885619770] [2021-06-05 16:38:46,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:46,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:38:46,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:46,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:46,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885619770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:46,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:46,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:38:46,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130358214] [2021-06-05 16:38:46,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:46,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:46,784 INFO L87 Difference]: Start difference. First operand 11425 states and 43466 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:48,074 INFO L93 Difference]: Finished difference Result 19821 states and 70618 transitions. [2021-06-05 16:38:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:38:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:48,121 INFO L225 Difference]: With dead ends: 19821 [2021-06-05 16:38:48,122 INFO L226 Difference]: Without dead ends: 19809 [2021-06-05 16:38:48,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 760.9ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:38:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19809 states. [2021-06-05 16:38:48,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19809 to 11307. [2021-06-05 16:38:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11307 states, 11306 states have (on average 3.8090394480806653) internal successors, (43065), 11306 states have internal predecessors, (43065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11307 states to 11307 states and 43065 transitions. [2021-06-05 16:38:48,516 INFO L78 Accepts]: Start accepts. Automaton has 11307 states and 43065 transitions. Word has length 28 [2021-06-05 16:38:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:48,516 INFO L482 AbstractCegarLoop]: Abstraction has 11307 states and 43065 transitions. [2021-06-05 16:38:48,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 11307 states and 43065 transitions. [2021-06-05 16:38:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:48,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:48,533 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:48,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4064,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:48,733 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 97 times [2021-06-05 16:38:48,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:48,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722761447] [2021-06-05 16:38:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:48,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722761447] [2021-06-05 16:38:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722761447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:48,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505862803] [2021-06-05 16:38:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:48,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505862803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:48,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:48,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:38:48,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551771655] [2021-06-05 16:38:48,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:48,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:48,873 INFO L87 Difference]: Start difference. First operand 11307 states and 43065 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:49,967 INFO L93 Difference]: Finished difference Result 19061 states and 68534 transitions. [2021-06-05 16:38:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:38:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:50,004 INFO L225 Difference]: With dead ends: 19061 [2021-06-05 16:38:50,004 INFO L226 Difference]: Without dead ends: 19025 [2021-06-05 16:38:50,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:38:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19025 states. [2021-06-05 16:38:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19025 to 11331. [2021-06-05 16:38:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11330 states have (on average 3.8080317740511913) internal successors, (43145), 11330 states have internal predecessors, (43145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 43145 transitions. [2021-06-05 16:38:50,269 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 43145 transitions. Word has length 28 [2021-06-05 16:38:50,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:50,270 INFO L482 AbstractCegarLoop]: Abstraction has 11331 states and 43145 transitions. [2021-06-05 16:38:50,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 43145 transitions. [2021-06-05 16:38:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:50,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:50,287 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:50,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-05 16:38:50,487 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:50,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 98 times [2021-06-05 16:38:50,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:50,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946539315] [2021-06-05 16:38:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:50,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:50,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946539315] [2021-06-05 16:38:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946539315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:50,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719939273] [2021-06-05 16:38:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:50,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:38:50,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:50,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719939273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:50,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:50,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:50,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954452822] [2021-06-05 16:38:50,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:50,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:50,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:50,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:50,685 INFO L87 Difference]: Start difference. First operand 11331 states and 43145 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:52,132 INFO L93 Difference]: Finished difference Result 27696 states and 98852 transitions. [2021-06-05 16:38:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 16:38:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:52,196 INFO L225 Difference]: With dead ends: 27696 [2021-06-05 16:38:52,196 INFO L226 Difference]: Without dead ends: 27696 [2021-06-05 16:38:52,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 838.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 16:38:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27696 states. [2021-06-05 16:38:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27696 to 11621. [2021-06-05 16:38:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11621 states, 11620 states have (on average 3.831239242685026) internal successors, (44519), 11620 states have internal predecessors, (44519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11621 states to 11621 states and 44519 transitions. [2021-06-05 16:38:52,600 INFO L78 Accepts]: Start accepts. Automaton has 11621 states and 44519 transitions. Word has length 28 [2021-06-05 16:38:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:52,600 INFO L482 AbstractCegarLoop]: Abstraction has 11621 states and 44519 transitions. [2021-06-05 16:38:52,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 11621 states and 44519 transitions. [2021-06-05 16:38:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:52,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:52,617 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:52,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4066 [2021-06-05 16:38:52,818 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:52,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 99 times [2021-06-05 16:38:52,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:52,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570668744] [2021-06-05 16:38:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:52,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:52,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570668744] [2021-06-05 16:38:52,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570668744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:52,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461650355] [2021-06-05 16:38:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:52,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:38:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:52,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:52,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461650355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:52,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:52,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:52,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685667593] [2021-06-05 16:38:52,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:52,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:52,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:52,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:52,977 INFO L87 Difference]: Start difference. First operand 11621 states and 44519 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:54,198 INFO L93 Difference]: Finished difference Result 27229 states and 97782 transitions. [2021-06-05 16:38:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 16:38:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:54,336 INFO L225 Difference]: With dead ends: 27229 [2021-06-05 16:38:54,337 INFO L226 Difference]: Without dead ends: 27229 [2021-06-05 16:38:54,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 751.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:38:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27229 states. [2021-06-05 16:38:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27229 to 11523. [2021-06-05 16:38:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11523 states, 11522 states have (on average 3.819562575941677) internal successors, (44009), 11522 states have internal predecessors, (44009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11523 states to 11523 states and 44009 transitions. [2021-06-05 16:38:54,646 INFO L78 Accepts]: Start accepts. Automaton has 11523 states and 44009 transitions. Word has length 28 [2021-06-05 16:38:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:54,646 INFO L482 AbstractCegarLoop]: Abstraction has 11523 states and 44009 transitions. [2021-06-05 16:38:54,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11523 states and 44009 transitions. [2021-06-05 16:38:54,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:54,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:54,663 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:54,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-05 16:38:54,863 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 100 times [2021-06-05 16:38:54,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:54,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138092376] [2021-06-05 16:38:54,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:54,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138092376] [2021-06-05 16:38:54,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138092376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347141976] [2021-06-05 16:38:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:54,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:38:54,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:54,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:55,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347141976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:55,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:55,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:38:55,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883111179] [2021-06-05 16:38:55,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:55,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:55,019 INFO L87 Difference]: Start difference. First operand 11523 states and 44009 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:55,838 INFO L93 Difference]: Finished difference Result 21512 states and 77611 transitions. [2021-06-05 16:38:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:38:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:55,880 INFO L225 Difference]: With dead ends: 21512 [2021-06-05 16:38:55,880 INFO L226 Difference]: Without dead ends: 21512 [2021-06-05 16:38:55,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:38:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21512 states. [2021-06-05 16:38:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21512 to 11532. [2021-06-05 16:38:56,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11532 states, 11531 states have (on average 3.8185760124880757) internal successors, (44032), 11531 states have internal predecessors, (44032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11532 states to 11532 states and 44032 transitions. [2021-06-05 16:38:56,157 INFO L78 Accepts]: Start accepts. Automaton has 11532 states and 44032 transitions. Word has length 28 [2021-06-05 16:38:56,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:56,157 INFO L482 AbstractCegarLoop]: Abstraction has 11532 states and 44032 transitions. [2021-06-05 16:38:56,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:56,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11532 states and 44032 transitions. [2021-06-05 16:38:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:56,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:56,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:56,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4068 [2021-06-05 16:38:56,374 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:56,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:56,374 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 101 times [2021-06-05 16:38:56,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:56,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595003935] [2021-06-05 16:38:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:56,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:56,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595003935] [2021-06-05 16:38:56,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595003935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:56,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862725252] [2021-06-05 16:38:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:56,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:38:56,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:56,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:56,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862725252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:56,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:56,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:38:56,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735194080] [2021-06-05 16:38:56,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:38:56,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:56,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:38:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:38:56,525 INFO L87 Difference]: Start difference. First operand 11532 states and 44032 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:57,321 INFO L93 Difference]: Finished difference Result 19923 states and 72552 transitions. [2021-06-05 16:38:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:38:57,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:57,360 INFO L225 Difference]: With dead ends: 19923 [2021-06-05 16:38:57,361 INFO L226 Difference]: Without dead ends: 19923 [2021-06-05 16:38:57,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:38:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19923 states. [2021-06-05 16:38:57,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19923 to 11544. [2021-06-05 16:38:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11544 states, 11543 states have (on average 3.817898293337954) internal successors, (44070), 11543 states have internal predecessors, (44070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11544 states to 11544 states and 44070 transitions. [2021-06-05 16:38:57,640 INFO L78 Accepts]: Start accepts. Automaton has 11544 states and 44070 transitions. Word has length 28 [2021-06-05 16:38:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:57,640 INFO L482 AbstractCegarLoop]: Abstraction has 11544 states and 44070 transitions. [2021-06-05 16:38:57,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 11544 states and 44070 transitions. [2021-06-05 16:38:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:57,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:57,657 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:57,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:57,857 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 102 times [2021-06-05 16:38:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:57,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331575522] [2021-06-05 16:38:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:57,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:57,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331575522] [2021-06-05 16:38:57,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331575522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:57,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684564519] [2021-06-05 16:38:57,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:57,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:38:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:38:57,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:58,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684564519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:58,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:58,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:58,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141898223] [2021-06-05 16:38:58,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:58,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:58,017 INFO L87 Difference]: Start difference. First operand 11544 states and 44070 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:38:59,087 INFO L93 Difference]: Finished difference Result 20543 states and 74326 transitions. [2021-06-05 16:38:59,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 16:38:59,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:38:59,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:38:59,127 INFO L225 Difference]: With dead ends: 20543 [2021-06-05 16:38:59,127 INFO L226 Difference]: Without dead ends: 20543 [2021-06-05 16:38:59,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:38:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20543 states. [2021-06-05 16:38:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20543 to 11652. [2021-06-05 16:38:59,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11652 states, 11651 states have (on average 3.8111750064372156) internal successors, (44404), 11651 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:59,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11652 states to 11652 states and 44404 transitions. [2021-06-05 16:38:59,421 INFO L78 Accepts]: Start accepts. Automaton has 11652 states and 44404 transitions. Word has length 28 [2021-06-05 16:38:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:38:59,421 INFO L482 AbstractCegarLoop]: Abstraction has 11652 states and 44404 transitions. [2021-06-05 16:38:59,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:38:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11652 states and 44404 transitions. [2021-06-05 16:38:59,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:38:59,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:38:59,438 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:38:59,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:59,638 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:38:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:38:59,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 103 times [2021-06-05 16:38:59,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:38:59,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054722797] [2021-06-05 16:38:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:38:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:38:59,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:38:59,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054722797] [2021-06-05 16:38:59,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054722797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595765584] [2021-06-05 16:38:59,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:38:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:38:59,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:38:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:38:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:38:59,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595765584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:38:59,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:38:59,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:38:59,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811614890] [2021-06-05 16:38:59,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:38:59,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:38:59,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:38:59,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:38:59,790 INFO L87 Difference]: Start difference. First operand 11652 states and 44404 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:00,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:00,783 INFO L93 Difference]: Finished difference Result 20102 states and 73128 transitions. [2021-06-05 16:39:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:39:00,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:00,823 INFO L225 Difference]: With dead ends: 20102 [2021-06-05 16:39:00,823 INFO L226 Difference]: Without dead ends: 20098 [2021-06-05 16:39:00,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 573.8ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:39:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20098 states. [2021-06-05 16:39:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20098 to 11578. [2021-06-05 16:39:01,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 3.814891595404682) internal successors, (44165), 11577 states have internal predecessors, (44165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 44165 transitions. [2021-06-05 16:39:01,101 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 44165 transitions. Word has length 28 [2021-06-05 16:39:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:01,101 INFO L482 AbstractCegarLoop]: Abstraction has 11578 states and 44165 transitions. [2021-06-05 16:39:01,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 44165 transitions. [2021-06-05 16:39:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:01,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:01,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:01,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:01,318 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:01,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:01,318 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 104 times [2021-06-05 16:39:01,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:01,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139386286] [2021-06-05 16:39:01,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:01,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:01,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139386286] [2021-06-05 16:39:01,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139386286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:01,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571404828] [2021-06-05 16:39:01,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:01,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:01,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:01,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:01,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571404828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:01,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:01,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:39:01,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539733107] [2021-06-05 16:39:01,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:39:01,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:01,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:39:01,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:39:01,476 INFO L87 Difference]: Start difference. First operand 11578 states and 44165 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:02,568 INFO L93 Difference]: Finished difference Result 19515 states and 70543 transitions. [2021-06-05 16:39:02,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 16:39:02,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:02,606 INFO L225 Difference]: With dead ends: 19515 [2021-06-05 16:39:02,606 INFO L226 Difference]: Without dead ends: 19515 [2021-06-05 16:39:02,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 661.9ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:39:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19515 states. [2021-06-05 16:39:02,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19515 to 11805. [2021-06-05 16:39:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11805 states, 11804 states have (on average 3.8176042019654353) internal successors, (45063), 11804 states have internal predecessors, (45063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 45063 transitions. [2021-06-05 16:39:02,977 INFO L78 Accepts]: Start accepts. Automaton has 11805 states and 45063 transitions. Word has length 28 [2021-06-05 16:39:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:02,977 INFO L482 AbstractCegarLoop]: Abstraction has 11805 states and 45063 transitions. [2021-06-05 16:39:02,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 11805 states and 45063 transitions. [2021-06-05 16:39:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:02,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:02,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:03,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4072,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:03,195 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 105 times [2021-06-05 16:39:03,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:03,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176948450] [2021-06-05 16:39:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:03,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:03,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176948450] [2021-06-05 16:39:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176948450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594097342] [2021-06-05 16:39:03,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:03,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:39:03,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:03,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594097342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:03,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:03,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:39:03,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835260449] [2021-06-05 16:39:03,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:39:03,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:39:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:39:03,375 INFO L87 Difference]: Start difference. First operand 11805 states and 45063 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:04,397 INFO L93 Difference]: Finished difference Result 19219 states and 69718 transitions. [2021-06-05 16:39:04,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:39:04,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:04,434 INFO L225 Difference]: With dead ends: 19219 [2021-06-05 16:39:04,434 INFO L226 Difference]: Without dead ends: 19207 [2021-06-05 16:39:04,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 605.6ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:39:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19207 states. [2021-06-05 16:39:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19207 to 11907. [2021-06-05 16:39:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11907 states, 11906 states have (on average 3.81202754913489) internal successors, (45386), 11906 states have internal predecessors, (45386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11907 states to 11907 states and 45386 transitions. [2021-06-05 16:39:04,718 INFO L78 Accepts]: Start accepts. Automaton has 11907 states and 45386 transitions. Word has length 28 [2021-06-05 16:39:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:04,719 INFO L482 AbstractCegarLoop]: Abstraction has 11907 states and 45386 transitions. [2021-06-05 16:39:04,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 11907 states and 45386 transitions. [2021-06-05 16:39:04,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:04,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:04,736 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:04,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-05 16:39:04,936 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 70 times [2021-06-05 16:39:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:04,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317435298] [2021-06-05 16:39:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:04,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:04,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317435298] [2021-06-05 16:39:04,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317435298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:04,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280040378] [2021-06-05 16:39:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:05,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:05,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:05,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:05,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280040378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:05,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:05,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:39:05,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122292924] [2021-06-05 16:39:05,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:05,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:05,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:05,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:05,064 INFO L87 Difference]: Start difference. First operand 11907 states and 45386 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:05,544 INFO L93 Difference]: Finished difference Result 16719 states and 62078 transitions. [2021-06-05 16:39:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:39:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:05,577 INFO L225 Difference]: With dead ends: 16719 [2021-06-05 16:39:05,577 INFO L226 Difference]: Without dead ends: 16719 [2021-06-05 16:39:05,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:39:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16719 states. [2021-06-05 16:39:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16719 to 11979. [2021-06-05 16:39:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11979 states, 11978 states have (on average 3.8078143262648187) internal successors, (45610), 11978 states have internal predecessors, (45610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11979 states to 11979 states and 45610 transitions. [2021-06-05 16:39:05,826 INFO L78 Accepts]: Start accepts. Automaton has 11979 states and 45610 transitions. Word has length 28 [2021-06-05 16:39:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:05,826 INFO L482 AbstractCegarLoop]: Abstraction has 11979 states and 45610 transitions. [2021-06-05 16:39:05,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 11979 states and 45610 transitions. [2021-06-05 16:39:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:05,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:05,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:06,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4074 [2021-06-05 16:39:06,043 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 71 times [2021-06-05 16:39:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774671549] [2021-06-05 16:39:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:06,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:06,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774671549] [2021-06-05 16:39:06,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774671549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:06,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240541757] [2021-06-05 16:39:06,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:06,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:39:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:06,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240541757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:06,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:06,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:39:06,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842783279] [2021-06-05 16:39:06,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:06,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:06,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:06,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:06,163 INFO L87 Difference]: Start difference. First operand 11979 states and 45610 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:06,743 INFO L93 Difference]: Finished difference Result 17700 states and 64924 transitions. [2021-06-05 16:39:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:39:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:06,778 INFO L225 Difference]: With dead ends: 17700 [2021-06-05 16:39:06,778 INFO L226 Difference]: Without dead ends: 17700 [2021-06-05 16:39:06,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 291.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:39:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17700 states. [2021-06-05 16:39:07,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17700 to 12313. [2021-06-05 16:39:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12313 states, 12312 states have (on average 3.790529564652372) internal successors, (46669), 12312 states have internal predecessors, (46669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12313 states to 12313 states and 46669 transitions. [2021-06-05 16:39:07,049 INFO L78 Accepts]: Start accepts. Automaton has 12313 states and 46669 transitions. Word has length 28 [2021-06-05 16:39:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:07,049 INFO L482 AbstractCegarLoop]: Abstraction has 12313 states and 46669 transitions. [2021-06-05 16:39:07,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12313 states and 46669 transitions. [2021-06-05 16:39:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:07,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:07,066 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:07,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4075 [2021-06-05 16:39:07,267 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:07,267 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 72 times [2021-06-05 16:39:07,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:07,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067143858] [2021-06-05 16:39:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:07,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:07,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067143858] [2021-06-05 16:39:07,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067143858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:07,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890398977] [2021-06-05 16:39:07,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:07,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 16:39:07,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:07,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:07,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890398977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:07,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:07,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:39:07,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848618537] [2021-06-05 16:39:07,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:07,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:07,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:07,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:07,384 INFO L87 Difference]: Start difference. First operand 12313 states and 46669 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:07,816 INFO L93 Difference]: Finished difference Result 17190 states and 63587 transitions. [2021-06-05 16:39:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:39:07,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:07,852 INFO L225 Difference]: With dead ends: 17190 [2021-06-05 16:39:07,853 INFO L226 Difference]: Without dead ends: 17182 [2021-06-05 16:39:07,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:39:07,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2021-06-05 16:39:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 12253. [2021-06-05 16:39:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12253 states, 12252 states have (on average 3.7924420502775056) internal successors, (46465), 12252 states have internal predecessors, (46465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12253 states to 12253 states and 46465 transitions. [2021-06-05 16:39:08,145 INFO L78 Accepts]: Start accepts. Automaton has 12253 states and 46465 transitions. Word has length 28 [2021-06-05 16:39:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:08,145 INFO L482 AbstractCegarLoop]: Abstraction has 12253 states and 46465 transitions. [2021-06-05 16:39:08,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 12253 states and 46465 transitions. [2021-06-05 16:39:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:08,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:08,163 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:08,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-06-05 16:39:08,364 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:08,364 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 73 times [2021-06-05 16:39:08,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:08,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7022070] [2021-06-05 16:39:08,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:08,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:08,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7022070] [2021-06-05 16:39:08,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7022070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:08,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665710074] [2021-06-05 16:39:08,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:08,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:08,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:08,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665710074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:08,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:08,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:39:08,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321571565] [2021-06-05 16:39:08,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:08,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:08,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:08,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:08,484 INFO L87 Difference]: Start difference. First operand 12253 states and 46465 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:08,945 INFO L93 Difference]: Finished difference Result 17090 states and 63299 transitions. [2021-06-05 16:39:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:39:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:08,983 INFO L225 Difference]: With dead ends: 17090 [2021-06-05 16:39:08,983 INFO L226 Difference]: Without dead ends: 17078 [2021-06-05 16:39:08,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:39:08,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17078 states. [2021-06-05 16:39:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17078 to 12219. [2021-06-05 16:39:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 12218 states have (on average 3.7944017024062857) internal successors, (46360), 12218 states have internal predecessors, (46360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 46360 transitions. [2021-06-05 16:39:09,235 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 46360 transitions. Word has length 28 [2021-06-05 16:39:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:09,235 INFO L482 AbstractCegarLoop]: Abstraction has 12219 states and 46360 transitions. [2021-06-05 16:39:09,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 46360 transitions. [2021-06-05 16:39:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:09,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:09,253 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:09,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4077 [2021-06-05 16:39:09,453 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 74 times [2021-06-05 16:39:09,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:09,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362264209] [2021-06-05 16:39:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:09,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:09,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362264209] [2021-06-05 16:39:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362264209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:09,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194342832] [2021-06-05 16:39:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:09,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:09,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:09,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:09,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194342832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:09,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:09,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:39:09,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990493615] [2021-06-05 16:39:09,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:39:09,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:39:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:39:09,603 INFO L87 Difference]: Start difference. First operand 12219 states and 46360 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:10,563 INFO L93 Difference]: Finished difference Result 23045 states and 82416 transitions. [2021-06-05 16:39:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:39:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:10,607 INFO L225 Difference]: With dead ends: 23045 [2021-06-05 16:39:10,607 INFO L226 Difference]: Without dead ends: 23045 [2021-06-05 16:39:10,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 513.8ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:39:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23045 states. [2021-06-05 16:39:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23045 to 12201. [2021-06-05 16:39:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12201 states, 12200 states have (on average 3.7931967213114755) internal successors, (46277), 12200 states have internal predecessors, (46277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12201 states to 12201 states and 46277 transitions. [2021-06-05 16:39:10,902 INFO L78 Accepts]: Start accepts. Automaton has 12201 states and 46277 transitions. Word has length 28 [2021-06-05 16:39:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:10,902 INFO L482 AbstractCegarLoop]: Abstraction has 12201 states and 46277 transitions. [2021-06-05 16:39:10,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 12201 states and 46277 transitions. [2021-06-05 16:39:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:10,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:10,920 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:11,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4078 [2021-06-05 16:39:11,121 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:11,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 106 times [2021-06-05 16:39:11,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:11,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541997545] [2021-06-05 16:39:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:11,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:11,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541997545] [2021-06-05 16:39:11,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541997545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:11,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99543394] [2021-06-05 16:39:11,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:11,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:11,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:11,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99543394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:11,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:11,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:39:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759179775] [2021-06-05 16:39:11,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:11,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:11,256 INFO L87 Difference]: Start difference. First operand 12201 states and 46277 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:11,935 INFO L93 Difference]: Finished difference Result 18822 states and 68098 transitions. [2021-06-05 16:39:11,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:39:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:11,971 INFO L225 Difference]: With dead ends: 18822 [2021-06-05 16:39:11,971 INFO L226 Difference]: Without dead ends: 18806 [2021-06-05 16:39:11,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:39:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18806 states. [2021-06-05 16:39:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18806 to 13509. [2021-06-05 16:39:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13509 states, 13508 states have (on average 3.85475273911756) internal successors, (52070), 13508 states have internal predecessors, (52070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13509 states to 13509 states and 52070 transitions. [2021-06-05 16:39:12,274 INFO L78 Accepts]: Start accepts. Automaton has 13509 states and 52070 transitions. Word has length 28 [2021-06-05 16:39:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:12,274 INFO L482 AbstractCegarLoop]: Abstraction has 13509 states and 52070 transitions. [2021-06-05 16:39:12,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:12,274 INFO L276 IsEmpty]: Start isEmpty. Operand 13509 states and 52070 transitions. [2021-06-05 16:39:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:12,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:12,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:12,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4079 [2021-06-05 16:39:12,496 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:12,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 107 times [2021-06-05 16:39:12,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:12,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314528077] [2021-06-05 16:39:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:12,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:12,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314528077] [2021-06-05 16:39:12,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314528077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:12,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077082725] [2021-06-05 16:39:12,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:12,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:39:12,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:12,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077082725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:12,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:12,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:39:12,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928644397] [2021-06-05 16:39:12,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:12,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:12,634 INFO L87 Difference]: Start difference. First operand 13509 states and 52070 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:13,389 INFO L93 Difference]: Finished difference Result 18923 states and 68358 transitions. [2021-06-05 16:39:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:39:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:13,426 INFO L225 Difference]: With dead ends: 18923 [2021-06-05 16:39:13,426 INFO L226 Difference]: Without dead ends: 18917 [2021-06-05 16:39:13,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:39:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18917 states. [2021-06-05 16:39:13,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18917 to 13479. [2021-06-05 16:39:13,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 3.8540584656477224) internal successors, (51945), 13478 states have internal predecessors, (51945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 51945 transitions. [2021-06-05 16:39:13,791 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 51945 transitions. Word has length 28 [2021-06-05 16:39:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:13,791 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 51945 transitions. [2021-06-05 16:39:13,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:13,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 51945 transitions. [2021-06-05 16:39:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:13,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:13,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:14,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:14,012 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 108 times [2021-06-05 16:39:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:14,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796298819] [2021-06-05 16:39:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:14,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:14,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796298819] [2021-06-05 16:39:14,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796298819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:14,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084521251] [2021-06-05 16:39:14,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:14,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:39:14,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:14,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:14,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:14,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084521251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:14,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:14,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:39:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857248239] [2021-06-05 16:39:14,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:14,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:14,195 INFO L87 Difference]: Start difference. First operand 13479 states and 51945 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:14,815 INFO L93 Difference]: Finished difference Result 21275 states and 76975 transitions. [2021-06-05 16:39:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:39:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:14,857 INFO L225 Difference]: With dead ends: 21275 [2021-06-05 16:39:14,857 INFO L226 Difference]: Without dead ends: 21259 [2021-06-05 16:39:14,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:39:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21259 states. [2021-06-05 16:39:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21259 to 13567. [2021-06-05 16:39:15,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13567 states, 13566 states have (on average 3.861270824119121) internal successors, (52382), 13566 states have internal predecessors, (52382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13567 states to 13567 states and 52382 transitions. [2021-06-05 16:39:15,172 INFO L78 Accepts]: Start accepts. Automaton has 13567 states and 52382 transitions. Word has length 28 [2021-06-05 16:39:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:15,172 INFO L482 AbstractCegarLoop]: Abstraction has 13567 states and 52382 transitions. [2021-06-05 16:39:15,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 13567 states and 52382 transitions. [2021-06-05 16:39:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:15,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:15,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:15,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-06-05 16:39:15,393 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:15,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 109 times [2021-06-05 16:39:15,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:15,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839917571] [2021-06-05 16:39:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:15,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839917571] [2021-06-05 16:39:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839917571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320290649] [2021-06-05 16:39:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320290649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:15,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:15,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 16:39:15,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19329276] [2021-06-05 16:39:15,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:15,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:15,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:15,522 INFO L87 Difference]: Start difference. First operand 13567 states and 52382 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:16,210 INFO L93 Difference]: Finished difference Result 22620 states and 81208 transitions. [2021-06-05 16:39:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:39:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:16,254 INFO L225 Difference]: With dead ends: 22620 [2021-06-05 16:39:16,255 INFO L226 Difference]: Without dead ends: 22620 [2021-06-05 16:39:16,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:39:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-06-05 16:39:16,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 13595. [2021-06-05 16:39:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13595 states, 13594 states have (on average 3.8592761512431957) internal successors, (52463), 13594 states have internal predecessors, (52463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13595 states to 13595 states and 52463 transitions. [2021-06-05 16:39:16,708 INFO L78 Accepts]: Start accepts. Automaton has 13595 states and 52463 transitions. Word has length 28 [2021-06-05 16:39:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:16,708 INFO L482 AbstractCegarLoop]: Abstraction has 13595 states and 52463 transitions. [2021-06-05 16:39:16,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 13595 states and 52463 transitions. [2021-06-05 16:39:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:16,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:16,729 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:16,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4082,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:16,930 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 75 times [2021-06-05 16:39:16,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:16,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130446318] [2021-06-05 16:39:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:16,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130446318] [2021-06-05 16:39:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130446318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:16,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812783083] [2021-06-05 16:39:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:16,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 16:39:16,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:17,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812783083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:17,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:17,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:39:17,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735513458] [2021-06-05 16:39:17,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:17,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:17,062 INFO L87 Difference]: Start difference. First operand 13595 states and 52463 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:17,965 INFO L93 Difference]: Finished difference Result 23180 states and 85433 transitions. [2021-06-05 16:39:17,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:39:17,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:18,014 INFO L225 Difference]: With dead ends: 23180 [2021-06-05 16:39:18,015 INFO L226 Difference]: Without dead ends: 23176 [2021-06-05 16:39:18,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 523.4ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:39:18,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23176 states. [2021-06-05 16:39:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23176 to 13849. [2021-06-05 16:39:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 3.849364529173888) internal successors, (53306), 13848 states have internal predecessors, (53306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 53306 transitions. [2021-06-05 16:39:18,391 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 53306 transitions. Word has length 28 [2021-06-05 16:39:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:18,391 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 53306 transitions. [2021-06-05 16:39:18,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 53306 transitions. [2021-06-05 16:39:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:18,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:18,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:18,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-06-05 16:39:18,615 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 110 times [2021-06-05 16:39:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121439890] [2021-06-05 16:39:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:18,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:18,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121439890] [2021-06-05 16:39:18,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121439890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:18,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248139548] [2021-06-05 16:39:18,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:18,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:18,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:18,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248139548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:18,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:18,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:39:18,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061048496] [2021-06-05 16:39:18,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:18,737 INFO L87 Difference]: Start difference. First operand 13849 states and 53306 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:19,354 INFO L93 Difference]: Finished difference Result 20157 states and 74048 transitions. [2021-06-05 16:39:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:39:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:19,394 INFO L225 Difference]: With dead ends: 20157 [2021-06-05 16:39:19,394 INFO L226 Difference]: Without dead ends: 20131 [2021-06-05 16:39:19,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:39:19,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20131 states. [2021-06-05 16:39:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20131 to 13251. [2021-06-05 16:39:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13251 states, 13250 states have (on average 3.8595471698113206) internal successors, (51139), 13250 states have internal predecessors, (51139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13251 states to 13251 states and 51139 transitions. [2021-06-05 16:39:19,828 INFO L78 Accepts]: Start accepts. Automaton has 13251 states and 51139 transitions. Word has length 28 [2021-06-05 16:39:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:19,828 INFO L482 AbstractCegarLoop]: Abstraction has 13251 states and 51139 transitions. [2021-06-05 16:39:19,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 13251 states and 51139 transitions. [2021-06-05 16:39:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:19,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:19,850 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:20,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4084,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:20,051 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 111 times [2021-06-05 16:39:20,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:20,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343019208] [2021-06-05 16:39:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:20,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343019208] [2021-06-05 16:39:20,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343019208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:20,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444257031] [2021-06-05 16:39:20,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:20,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:39:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:20,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444257031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:20,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:20,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:39:20,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428804693] [2021-06-05 16:39:20,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:20,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:20,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:20,189 INFO L87 Difference]: Start difference. First operand 13251 states and 51139 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:20,987 INFO L93 Difference]: Finished difference Result 19214 states and 69517 transitions. [2021-06-05 16:39:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:39:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:21,028 INFO L225 Difference]: With dead ends: 19214 [2021-06-05 16:39:21,028 INFO L226 Difference]: Without dead ends: 19214 [2021-06-05 16:39:21,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:39:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19214 states. [2021-06-05 16:39:21,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19214 to 13464. [2021-06-05 16:39:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13464 states, 13463 states have (on average 3.854935749832875) internal successors, (51899), 13463 states have internal predecessors, (51899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13464 states to 13464 states and 51899 transitions. [2021-06-05 16:39:21,360 INFO L78 Accepts]: Start accepts. Automaton has 13464 states and 51899 transitions. Word has length 28 [2021-06-05 16:39:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:21,360 INFO L482 AbstractCegarLoop]: Abstraction has 13464 states and 51899 transitions. [2021-06-05 16:39:21,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13464 states and 51899 transitions. [2021-06-05 16:39:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:21,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:21,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:21,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4085,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:21,581 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:21,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash -674876415, now seen corresponding path program 112 times [2021-06-05 16:39:21,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:21,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614191396] [2021-06-05 16:39:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:21,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614191396] [2021-06-05 16:39:21,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614191396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:21,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272724862] [2021-06-05 16:39:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:21,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:21,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272724862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:21,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:21,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:39:21,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932990910] [2021-06-05 16:39:21,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:21,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:21,708 INFO L87 Difference]: Start difference. First operand 13464 states and 51899 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:22,396 INFO L93 Difference]: Finished difference Result 20483 states and 74562 transitions. [2021-06-05 16:39:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:39:22,396 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:22,436 INFO L225 Difference]: With dead ends: 20483 [2021-06-05 16:39:22,436 INFO L226 Difference]: Without dead ends: 20483 [2021-06-05 16:39:22,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:39:22,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-06-05 16:39:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 14177. [2021-06-05 16:39:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14177 states, 14176 states have (on average 3.8409988713318284) internal successors, (54450), 14176 states have internal predecessors, (54450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14177 states to 14177 states and 54450 transitions. [2021-06-05 16:39:22,742 INFO L78 Accepts]: Start accepts. Automaton has 14177 states and 54450 transitions. Word has length 28 [2021-06-05 16:39:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:22,742 INFO L482 AbstractCegarLoop]: Abstraction has 14177 states and 54450 transitions. [2021-06-05 16:39:22,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 14177 states and 54450 transitions. [2021-06-05 16:39:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:22,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:22,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:22,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4086 [2021-06-05 16:39:22,962 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash 78789957, now seen corresponding path program 113 times [2021-06-05 16:39:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:22,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250791323] [2021-06-05 16:39:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:22,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:22,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250791323] [2021-06-05 16:39:22,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250791323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:22,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205112779] [2021-06-05 16:39:22,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:23,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:39:23,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:23,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:23,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205112779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:23,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:23,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:39:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366581450] [2021-06-05 16:39:23,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:23,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:23,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:23,096 INFO L87 Difference]: Start difference. First operand 14177 states and 54450 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:23,916 INFO L93 Difference]: Finished difference Result 22983 states and 82487 transitions. [2021-06-05 16:39:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:39:23,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:23,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:23,960 INFO L225 Difference]: With dead ends: 22983 [2021-06-05 16:39:23,960 INFO L226 Difference]: Without dead ends: 22983 [2021-06-05 16:39:23,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:39:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22983 states. [2021-06-05 16:39:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22983 to 14420. [2021-06-05 16:39:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14420 states, 14419 states have (on average 3.8541507732852485) internal successors, (55573), 14419 states have internal predecessors, (55573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 55573 transitions. [2021-06-05 16:39:24,356 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 55573 transitions. Word has length 28 [2021-06-05 16:39:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:24,356 INFO L482 AbstractCegarLoop]: Abstraction has 14420 states and 55573 transitions. [2021-06-05 16:39:24,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 55573 transitions. [2021-06-05 16:39:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:24,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:24,377 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:24,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4087,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:24,578 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 76 times [2021-06-05 16:39:24,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:24,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871094839] [2021-06-05 16:39:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:24,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871094839] [2021-06-05 16:39:24,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871094839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882928660] [2021-06-05 16:39:24,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:24,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:24,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:24,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882928660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:24,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:24,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:39:24,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079092797] [2021-06-05 16:39:24,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:39:24,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:24,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:39:24,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:39:24,742 INFO L87 Difference]: Start difference. First operand 14420 states and 55573 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:26,268 INFO L93 Difference]: Finished difference Result 39692 states and 142842 transitions. [2021-06-05 16:39:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:39:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:26,357 INFO L225 Difference]: With dead ends: 39692 [2021-06-05 16:39:26,357 INFO L226 Difference]: Without dead ends: 39692 [2021-06-05 16:39:26,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 901.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:39:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39692 states. [2021-06-05 16:39:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39692 to 15659. [2021-06-05 16:39:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15659 states, 15658 states have (on average 3.899093115340401) internal successors, (61052), 15658 states have internal predecessors, (61052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15659 states to 15659 states and 61052 transitions. [2021-06-05 16:39:26,918 INFO L78 Accepts]: Start accepts. Automaton has 15659 states and 61052 transitions. Word has length 28 [2021-06-05 16:39:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 15659 states and 61052 transitions. [2021-06-05 16:39:26,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 15659 states and 61052 transitions. [2021-06-05 16:39:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:26,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:26,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:27,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-06-05 16:39:27,143 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:27,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 77 times [2021-06-05 16:39:27,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:27,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580757661] [2021-06-05 16:39:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:27,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580757661] [2021-06-05 16:39:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580757661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288429501] [2021-06-05 16:39:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:27,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:39:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:27,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:27,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288429501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:27,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:27,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:39:27,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373587537] [2021-06-05 16:39:27,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:39:27,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:27,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:39:27,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:39:27,310 INFO L87 Difference]: Start difference. First operand 15659 states and 61052 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:28,816 INFO L93 Difference]: Finished difference Result 38708 states and 140253 transitions. [2021-06-05 16:39:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:39:28,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:28,901 INFO L225 Difference]: With dead ends: 38708 [2021-06-05 16:39:28,901 INFO L226 Difference]: Without dead ends: 38708 [2021-06-05 16:39:28,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 964.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 16:39:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38708 states. [2021-06-05 16:39:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38708 to 15633. [2021-06-05 16:39:29,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15633 states, 15632 states have (on average 3.895598771750256) internal successors, (60896), 15632 states have internal predecessors, (60896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15633 states to 15633 states and 60896 transitions. [2021-06-05 16:39:29,410 INFO L78 Accepts]: Start accepts. Automaton has 15633 states and 60896 transitions. Word has length 28 [2021-06-05 16:39:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:29,410 INFO L482 AbstractCegarLoop]: Abstraction has 15633 states and 60896 transitions. [2021-06-05 16:39:29,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:29,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15633 states and 60896 transitions. [2021-06-05 16:39:29,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:29,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:29,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:29,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 16:39:29,634 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:29,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 114 times [2021-06-05 16:39:29,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:29,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948673709] [2021-06-05 16:39:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:29,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:29,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948673709] [2021-06-05 16:39:29,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948673709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:29,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428162412] [2021-06-05 16:39:29,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:29,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:39:29,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:29,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:29,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:29,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428162412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:29,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:29,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:39:29,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511590286] [2021-06-05 16:39:29,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:29,751 INFO L87 Difference]: Start difference. First operand 15633 states and 60896 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:30,034 INFO L93 Difference]: Finished difference Result 24061 states and 92296 transitions. [2021-06-05 16:39:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 16:39:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:30,088 INFO L225 Difference]: With dead ends: 24061 [2021-06-05 16:39:30,088 INFO L226 Difference]: Without dead ends: 24014 [2021-06-05 16:39:30,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:39:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24014 states. [2021-06-05 16:39:30,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24014 to 20722. [2021-06-05 16:39:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20722 states, 20721 states have (on average 3.9071473384489166) internal successors, (80960), 20721 states have internal predecessors, (80960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20722 states to 20722 states and 80960 transitions. [2021-06-05 16:39:30,516 INFO L78 Accepts]: Start accepts. Automaton has 20722 states and 80960 transitions. Word has length 28 [2021-06-05 16:39:30,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:30,516 INFO L482 AbstractCegarLoop]: Abstraction has 20722 states and 80960 transitions. [2021-06-05 16:39:30,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:30,516 INFO L276 IsEmpty]: Start isEmpty. Operand 20722 states and 80960 transitions. [2021-06-05 16:39:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:30,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:30,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:30,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:30,748 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 115 times [2021-06-05 16:39:30,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:30,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545763031] [2021-06-05 16:39:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:30,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:30,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545763031] [2021-06-05 16:39:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545763031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:30,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203970128] [2021-06-05 16:39:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:30,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203970128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:30,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:30,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:39:30,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065882678] [2021-06-05 16:39:30,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:39:30,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:39:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:39:30,868 INFO L87 Difference]: Start difference. First operand 20722 states and 80960 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:31,099 INFO L93 Difference]: Finished difference Result 23493 states and 89383 transitions. [2021-06-05 16:39:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:39:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:31,146 INFO L225 Difference]: With dead ends: 23493 [2021-06-05 16:39:31,147 INFO L226 Difference]: Without dead ends: 23493 [2021-06-05 16:39:31,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23493 states. [2021-06-05 16:39:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23493 to 20225. [2021-06-05 16:39:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20225 states, 20224 states have (on average 3.895767405063291) internal successors, (78788), 20224 states have internal predecessors, (78788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:31,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20225 states to 20225 states and 78788 transitions. [2021-06-05 16:39:31,666 INFO L78 Accepts]: Start accepts. Automaton has 20225 states and 78788 transitions. Word has length 28 [2021-06-05 16:39:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:31,666 INFO L482 AbstractCegarLoop]: Abstraction has 20225 states and 78788 transitions. [2021-06-05 16:39:31,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 20225 states and 78788 transitions. [2021-06-05 16:39:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:31,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:31,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:31,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4091 [2021-06-05 16:39:31,896 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 116 times [2021-06-05 16:39:31,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:31,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006126079] [2021-06-05 16:39:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:31,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006126079] [2021-06-05 16:39:31,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006126079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:31,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113213950] [2021-06-05 16:39:31,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:31,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:31,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:31,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:32,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113213950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:32,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:32,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 16:39:32,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084671675] [2021-06-05 16:39:32,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:39:32,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:39:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:39:32,041 INFO L87 Difference]: Start difference. First operand 20225 states and 78788 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:32,966 INFO L93 Difference]: Finished difference Result 32091 states and 118994 transitions. [2021-06-05 16:39:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:39:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:33,038 INFO L225 Difference]: With dead ends: 32091 [2021-06-05 16:39:33,038 INFO L226 Difference]: Without dead ends: 32091 [2021-06-05 16:39:33,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 485.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:39:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32091 states. [2021-06-05 16:39:33,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32091 to 20291. [2021-06-05 16:39:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20291 states, 20290 states have (on average 3.8938393297190736) internal successors, (79006), 20290 states have internal predecessors, (79006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20291 states to 20291 states and 79006 transitions. [2021-06-05 16:39:33,532 INFO L78 Accepts]: Start accepts. Automaton has 20291 states and 79006 transitions. Word has length 28 [2021-06-05 16:39:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:33,532 INFO L482 AbstractCegarLoop]: Abstraction has 20291 states and 79006 transitions. [2021-06-05 16:39:33,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 20291 states and 79006 transitions. [2021-06-05 16:39:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:33,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:33,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:33,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:33,765 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:33,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:33,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 117 times [2021-06-05 16:39:33,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:33,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582980710] [2021-06-05 16:39:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:33,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:33,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582980710] [2021-06-05 16:39:33,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582980710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:33,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953772074] [2021-06-05 16:39:33,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:33,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:39:33,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:33,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:33,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953772074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:33,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:33,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:39:33,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135365345] [2021-06-05 16:39:33,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:39:33,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:39:33,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:39:33,921 INFO L87 Difference]: Start difference. First operand 20291 states and 79006 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:35,399 INFO L93 Difference]: Finished difference Result 40978 states and 150264 transitions. [2021-06-05 16:39:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:39:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:35,498 INFO L225 Difference]: With dead ends: 40978 [2021-06-05 16:39:35,498 INFO L226 Difference]: Without dead ends: 40978 [2021-06-05 16:39:35,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 867.2ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 16:39:35,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40978 states. [2021-06-05 16:39:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40978 to 20294. [2021-06-05 16:39:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20294 states, 20293 states have (on average 3.895924703099591) internal successors, (79060), 20293 states have internal predecessors, (79060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20294 states to 20294 states and 79060 transitions. [2021-06-05 16:39:36,172 INFO L78 Accepts]: Start accepts. Automaton has 20294 states and 79060 transitions. Word has length 28 [2021-06-05 16:39:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:36,172 INFO L482 AbstractCegarLoop]: Abstraction has 20294 states and 79060 transitions. [2021-06-05 16:39:36,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 20294 states and 79060 transitions. [2021-06-05 16:39:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:36,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:36,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:36,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-06-05 16:39:36,403 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:36,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 118 times [2021-06-05 16:39:36,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:36,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692879154] [2021-06-05 16:39:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:36,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:36,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692879154] [2021-06-05 16:39:36,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692879154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:36,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748166524] [2021-06-05 16:39:36,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:36,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:36,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:36,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:36,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748166524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:36,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:36,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:39:36,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585861187] [2021-06-05 16:39:36,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:39:36,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:39:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:39:36,560 INFO L87 Difference]: Start difference. First operand 20294 states and 79060 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:37,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:37,987 INFO L93 Difference]: Finished difference Result 40582 states and 149545 transitions. [2021-06-05 16:39:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:39:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:38,096 INFO L225 Difference]: With dead ends: 40582 [2021-06-05 16:39:38,096 INFO L226 Difference]: Without dead ends: 40582 [2021-06-05 16:39:38,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 16:39:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40582 states. [2021-06-05 16:39:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40582 to 20081. [2021-06-05 16:39:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20081 states, 20080 states have (on average 3.888147410358566) internal successors, (78074), 20080 states have internal predecessors, (78074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20081 states to 20081 states and 78074 transitions. [2021-06-05 16:39:38,689 INFO L78 Accepts]: Start accepts. Automaton has 20081 states and 78074 transitions. Word has length 28 [2021-06-05 16:39:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:38,689 INFO L482 AbstractCegarLoop]: Abstraction has 20081 states and 78074 transitions. [2021-06-05 16:39:38,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20081 states and 78074 transitions. [2021-06-05 16:39:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:38,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:38,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:38,920 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:38,920 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 119 times [2021-06-05 16:39:38,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:38,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372854764] [2021-06-05 16:39:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:38,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:38,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372854764] [2021-06-05 16:39:38,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372854764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:38,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264834826] [2021-06-05 16:39:38,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:38,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:39:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:38,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:39:38,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:39:39,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264834826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:39,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:39,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:39:39,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120926985] [2021-06-05 16:39:39,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:39:39,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:39,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:39:39,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:39:39,030 INFO L87 Difference]: Start difference. First operand 20081 states and 78074 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:39,388 INFO L93 Difference]: Finished difference Result 29766 states and 111237 transitions. [2021-06-05 16:39:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:39:39,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:39,460 INFO L225 Difference]: With dead ends: 29766 [2021-06-05 16:39:39,460 INFO L226 Difference]: Without dead ends: 29749 [2021-06-05 16:39:39,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:39:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29749 states. [2021-06-05 16:39:39,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29749 to 20349. [2021-06-05 16:39:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20349 states, 20348 states have (on average 3.8934047572242974) internal successors, (79223), 20348 states have internal predecessors, (79223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20349 states to 20349 states and 79223 transitions. [2021-06-05 16:39:39,996 INFO L78 Accepts]: Start accepts. Automaton has 20349 states and 79223 transitions. Word has length 28 [2021-06-05 16:39:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:39,996 INFO L482 AbstractCegarLoop]: Abstraction has 20349 states and 79223 transitions. [2021-06-05 16:39:39,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 20349 states and 79223 transitions. [2021-06-05 16:39:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:40,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:40,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:40,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-06-05 16:39:40,228 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 120 times [2021-06-05 16:39:40,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:40,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463692290] [2021-06-05 16:39:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:40,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:40,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463692290] [2021-06-05 16:39:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463692290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:40,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581857620] [2021-06-05 16:39:40,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:40,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:39:40,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:40,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:39:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:39:40,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581857620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:40,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:40,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:39:40,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551678862] [2021-06-05 16:39:40,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:39:40,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:40,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:39:40,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:39:40,362 INFO L87 Difference]: Start difference. First operand 20349 states and 79223 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:40,658 INFO L93 Difference]: Finished difference Result 31558 states and 116818 transitions. [2021-06-05 16:39:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:39:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:40,728 INFO L225 Difference]: With dead ends: 31558 [2021-06-05 16:39:40,728 INFO L226 Difference]: Without dead ends: 31558 [2021-06-05 16:39:40,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 16:39:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31558 states. [2021-06-05 16:39:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31558 to 20016. [2021-06-05 16:39:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20016 states, 20015 states have (on average 3.8783912065950537) internal successors, (77626), 20015 states have internal predecessors, (77626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:41,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20016 states to 20016 states and 77626 transitions. [2021-06-05 16:39:41,176 INFO L78 Accepts]: Start accepts. Automaton has 20016 states and 77626 transitions. Word has length 28 [2021-06-05 16:39:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:41,176 INFO L482 AbstractCegarLoop]: Abstraction has 20016 states and 77626 transitions. [2021-06-05 16:39:41,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 20016 states and 77626 transitions. [2021-06-05 16:39:41,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:41,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:41,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:41,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-05 16:39:41,405 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 121 times [2021-06-05 16:39:41,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:41,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774032618] [2021-06-05 16:39:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:41,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774032618] [2021-06-05 16:39:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774032618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:41,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615587008] [2021-06-05 16:39:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:41,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615587008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:41,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:41,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:39:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156525952] [2021-06-05 16:39:41,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:41,540 INFO L87 Difference]: Start difference. First operand 20016 states and 77626 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:42,330 INFO L93 Difference]: Finished difference Result 29601 states and 110146 transitions. [2021-06-05 16:39:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:39:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:42,398 INFO L225 Difference]: With dead ends: 29601 [2021-06-05 16:39:42,398 INFO L226 Difference]: Without dead ends: 29601 [2021-06-05 16:39:42,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 403.2ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:39:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-06-05 16:39:42,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 20064. [2021-06-05 16:39:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20064 states, 20063 states have (on average 3.8771868613866323) internal successors, (77788), 20063 states have internal predecessors, (77788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20064 states to 20064 states and 77788 transitions. [2021-06-05 16:39:42,851 INFO L78 Accepts]: Start accepts. Automaton has 20064 states and 77788 transitions. Word has length 28 [2021-06-05 16:39:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:42,851 INFO L482 AbstractCegarLoop]: Abstraction has 20064 states and 77788 transitions. [2021-06-05 16:39:42,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20064 states and 77788 transitions. [2021-06-05 16:39:42,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:42,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:42,880 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:43,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4097,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:43,080 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 122 times [2021-06-05 16:39:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:43,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76737763] [2021-06-05 16:39:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:43,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:43,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76737763] [2021-06-05 16:39:43,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76737763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:43,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975891252] [2021-06-05 16:39:43,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:43,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:43,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:43,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:43,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:43,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975891252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:43,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:43,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:39:43,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401088121] [2021-06-05 16:39:43,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:43,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:43,215 INFO L87 Difference]: Start difference. First operand 20064 states and 77788 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:44,264 INFO L93 Difference]: Finished difference Result 31138 states and 114558 transitions. [2021-06-05 16:39:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 16:39:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:44,334 INFO L225 Difference]: With dead ends: 31138 [2021-06-05 16:39:44,335 INFO L226 Difference]: Without dead ends: 31138 [2021-06-05 16:39:44,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 16:39:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31138 states. [2021-06-05 16:39:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31138 to 20620. [2021-06-05 16:39:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20620 states, 20619 states have (on average 3.855958096900917) internal successors, (79506), 20619 states have internal predecessors, (79506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20620 states to 20620 states and 79506 transitions. [2021-06-05 16:39:44,842 INFO L78 Accepts]: Start accepts. Automaton has 20620 states and 79506 transitions. Word has length 28 [2021-06-05 16:39:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:44,842 INFO L482 AbstractCegarLoop]: Abstraction has 20620 states and 79506 transitions. [2021-06-05 16:39:44,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:44,843 INFO L276 IsEmpty]: Start isEmpty. Operand 20620 states and 79506 transitions. [2021-06-05 16:39:44,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:44,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:44,872 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:45,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-06-05 16:39:45,072 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:45,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:45,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 123 times [2021-06-05 16:39:45,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:45,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007103341] [2021-06-05 16:39:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:45,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:45,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007103341] [2021-06-05 16:39:45,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007103341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:45,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806867463] [2021-06-05 16:39:45,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:45,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:39:45,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:45,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:45,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806867463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:45,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:45,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 16:39:45,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870820403] [2021-06-05 16:39:45,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:39:45,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:45,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:39:45,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:39:45,201 INFO L87 Difference]: Start difference. First operand 20620 states and 79506 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:46,029 INFO L93 Difference]: Finished difference Result 30264 states and 112255 transitions. [2021-06-05 16:39:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:39:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:46,097 INFO L225 Difference]: With dead ends: 30264 [2021-06-05 16:39:46,097 INFO L226 Difference]: Without dead ends: 30260 [2021-06-05 16:39:46,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:39:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30260 states. [2021-06-05 16:39:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30260 to 20512. [2021-06-05 16:39:46,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 3.858612451855102) internal successors, (79144), 20511 states have internal predecessors, (79144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 79144 transitions. [2021-06-05 16:39:46,602 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 79144 transitions. Word has length 28 [2021-06-05 16:39:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:46,602 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 79144 transitions. [2021-06-05 16:39:46,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 79144 transitions. [2021-06-05 16:39:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:46,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:46,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:46,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-06-05 16:39:46,833 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 124 times [2021-06-05 16:39:46,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:46,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152227026] [2021-06-05 16:39:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:46,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152227026] [2021-06-05 16:39:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152227026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:46,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141297015] [2021-06-05 16:39:46,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:46,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:46,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:39:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 16:39:46,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141297015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:46,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:46,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 16:39:46,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320361915] [2021-06-05 16:39:46,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:39:46,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:39:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:39:46,943 INFO L87 Difference]: Start difference. First operand 20512 states and 79144 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:47,164 INFO L93 Difference]: Finished difference Result 25599 states and 95352 transitions. [2021-06-05 16:39:47,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:39:47,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:47,222 INFO L225 Difference]: With dead ends: 25599 [2021-06-05 16:39:47,223 INFO L226 Difference]: Without dead ends: 25599 [2021-06-05 16:39:47,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-05 16:39:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 20822. [2021-06-05 16:39:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20822 states, 20821 states have (on average 3.8498150905335957) internal successors, (80157), 20821 states have internal predecessors, (80157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20822 states to 20822 states and 80157 transitions. [2021-06-05 16:39:47,715 INFO L78 Accepts]: Start accepts. Automaton has 20822 states and 80157 transitions. Word has length 28 [2021-06-05 16:39:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:47,715 INFO L482 AbstractCegarLoop]: Abstraction has 20822 states and 80157 transitions. [2021-06-05 16:39:47,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 20822 states and 80157 transitions. [2021-06-05 16:39:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:47,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:47,747 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:47,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-06-05 16:39:47,947 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:47,947 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 125 times [2021-06-05 16:39:47,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:47,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133752511] [2021-06-05 16:39:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:47,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:47,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133752511] [2021-06-05 16:39:47,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133752511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:47,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13172977] [2021-06-05 16:39:47,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:48,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:39:48,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:48,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:48,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:39:48,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13172977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:48,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:48,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:39:48,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394684717] [2021-06-05 16:39:48,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:48,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:48,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:48,079 INFO L87 Difference]: Start difference. First operand 20822 states and 80157 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:48,891 INFO L93 Difference]: Finished difference Result 31377 states and 115045 transitions. [2021-06-05 16:39:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:39:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:48,963 INFO L225 Difference]: With dead ends: 31377 [2021-06-05 16:39:48,963 INFO L226 Difference]: Without dead ends: 31377 [2021-06-05 16:39:48,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 16:39:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31377 states. [2021-06-05 16:39:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31377 to 22482. [2021-06-05 16:39:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22482 states, 22481 states have (on average 3.8615719941283753) internal successors, (86812), 22481 states have internal predecessors, (86812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22482 states to 22482 states and 86812 transitions. [2021-06-05 16:39:49,481 INFO L78 Accepts]: Start accepts. Automaton has 22482 states and 86812 transitions. Word has length 28 [2021-06-05 16:39:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:49,481 INFO L482 AbstractCegarLoop]: Abstraction has 22482 states and 86812 transitions. [2021-06-05 16:39:49,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 22482 states and 86812 transitions. [2021-06-05 16:39:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:49,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:49,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:49,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-06-05 16:39:49,720 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:49,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 126 times [2021-06-05 16:39:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:49,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439239345] [2021-06-05 16:39:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:49,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439239345] [2021-06-05 16:39:49,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439239345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523083969] [2021-06-05 16:39:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:49,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:39:49,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:49,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 16:39:49,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523083969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:49,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:49,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:39:49,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864268005] [2021-06-05 16:39:49,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:49,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:49,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:49,852 INFO L87 Difference]: Start difference. First operand 22482 states and 86812 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:50,555 INFO L93 Difference]: Finished difference Result 29625 states and 110530 transitions. [2021-06-05 16:39:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:39:50,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:50,624 INFO L225 Difference]: With dead ends: 29625 [2021-06-05 16:39:50,624 INFO L226 Difference]: Without dead ends: 29613 [2021-06-05 16:39:50,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:39:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29613 states. [2021-06-05 16:39:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29613 to 22654. [2021-06-05 16:39:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22654 states, 22653 states have (on average 3.8557365470357126) internal successors, (87344), 22653 states have internal predecessors, (87344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22654 states to 22654 states and 87344 transitions. [2021-06-05 16:39:51,135 INFO L78 Accepts]: Start accepts. Automaton has 22654 states and 87344 transitions. Word has length 28 [2021-06-05 16:39:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:51,135 INFO L482 AbstractCegarLoop]: Abstraction has 22654 states and 87344 transitions. [2021-06-05 16:39:51,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 22654 states and 87344 transitions. [2021-06-05 16:39:51,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:51,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:51,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:51,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:51,369 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:51,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 127 times [2021-06-05 16:39:51,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:51,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641822223] [2021-06-05 16:39:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:51,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:51,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641822223] [2021-06-05 16:39:51,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641822223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:51,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793233801] [2021-06-05 16:39:51,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:39:51,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:39:51,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793233801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:51,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:51,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:39:51,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28389078] [2021-06-05 16:39:51,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:39:51,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:39:51,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:39:51,492 INFO L87 Difference]: Start difference. First operand 22654 states and 87344 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:51,867 INFO L93 Difference]: Finished difference Result 26104 states and 98956 transitions. [2021-06-05 16:39:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:39:51,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:51,924 INFO L225 Difference]: With dead ends: 26104 [2021-06-05 16:39:51,924 INFO L226 Difference]: Without dead ends: 26104 [2021-06-05 16:39:51,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 16:39:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26104 states. [2021-06-05 16:39:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26104 to 23491. [2021-06-05 16:39:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23491 states, 23490 states have (on average 3.8498084291187737) internal successors, (90432), 23490 states have internal predecessors, (90432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23491 states to 23491 states and 90432 transitions. [2021-06-05 16:39:52,408 INFO L78 Accepts]: Start accepts. Automaton has 23491 states and 90432 transitions. Word has length 28 [2021-06-05 16:39:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:52,408 INFO L482 AbstractCegarLoop]: Abstraction has 23491 states and 90432 transitions. [2021-06-05 16:39:52,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23491 states and 90432 transitions. [2021-06-05 16:39:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:52,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:52,452 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:52,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:52,674 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:52,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 128 times [2021-06-05 16:39:52,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:52,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561272050] [2021-06-05 16:39:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561272050] [2021-06-05 16:39:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561272050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:52,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345158122] [2021-06-05 16:39:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:52,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:39:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:52,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345158122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:52,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:52,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:39:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946130039] [2021-06-05 16:39:52,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:39:52,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:39:52,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:39:52,879 INFO L87 Difference]: Start difference. First operand 23491 states and 90432 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:53,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:53,772 INFO L93 Difference]: Finished difference Result 31312 states and 115741 transitions. [2021-06-05 16:39:53,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:39:53,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:53,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:53,846 INFO L225 Difference]: With dead ends: 31312 [2021-06-05 16:39:53,846 INFO L226 Difference]: Without dead ends: 31312 [2021-06-05 16:39:53,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 16:39:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31312 states. [2021-06-05 16:39:54,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31312 to 24677. [2021-06-05 16:39:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24677 states, 24676 states have (on average 3.8184875992867564) internal successors, (94225), 24676 states have internal predecessors, (94225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:54,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24677 states to 24677 states and 94225 transitions. [2021-06-05 16:39:54,414 INFO L78 Accepts]: Start accepts. Automaton has 24677 states and 94225 transitions. Word has length 28 [2021-06-05 16:39:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:54,414 INFO L482 AbstractCegarLoop]: Abstraction has 24677 states and 94225 transitions. [2021-06-05 16:39:54,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24677 states and 94225 transitions. [2021-06-05 16:39:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:54,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:54,450 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:54,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4104,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:54,651 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:54,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 129 times [2021-06-05 16:39:54,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:54,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532146448] [2021-06-05 16:39:54,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:54,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532146448] [2021-06-05 16:39:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532146448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439063298] [2021-06-05 16:39:54,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:54,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:39:54,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:54,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:54,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439063298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:54,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:54,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:39:54,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649647548] [2021-06-05 16:39:54,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:54,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:54,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:54,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:54,766 INFO L87 Difference]: Start difference. First operand 24677 states and 94225 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:55,339 INFO L93 Difference]: Finished difference Result 30413 states and 113358 transitions. [2021-06-05 16:39:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:39:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:55,409 INFO L225 Difference]: With dead ends: 30413 [2021-06-05 16:39:55,409 INFO L226 Difference]: Without dead ends: 30405 [2021-06-05 16:39:55,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:39:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30405 states. [2021-06-05 16:39:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30405 to 24499. [2021-06-05 16:39:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24499 states, 24498 states have (on average 3.824557106702588) internal successors, (93694), 24498 states have internal predecessors, (93694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24499 states to 24499 states and 93694 transitions. [2021-06-05 16:39:56,089 INFO L78 Accepts]: Start accepts. Automaton has 24499 states and 93694 transitions. Word has length 28 [2021-06-05 16:39:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:56,089 INFO L482 AbstractCegarLoop]: Abstraction has 24499 states and 93694 transitions. [2021-06-05 16:39:56,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 24499 states and 93694 transitions. [2021-06-05 16:39:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:56,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:56,124 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:56,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4105 [2021-06-05 16:39:56,325 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 130 times [2021-06-05 16:39:56,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:56,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196975753] [2021-06-05 16:39:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:56,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:56,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196975753] [2021-06-05 16:39:56,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196975753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:56,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491663117] [2021-06-05 16:39:56,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:56,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:39:56,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:56,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:56,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:56,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491663117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:56,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:56,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:39:56,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733073939] [2021-06-05 16:39:56,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:56,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:56,448 INFO L87 Difference]: Start difference. First operand 24499 states and 93694 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:57,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:57,186 INFO L93 Difference]: Finished difference Result 32257 states and 118986 transitions. [2021-06-05 16:39:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:39:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:57,259 INFO L225 Difference]: With dead ends: 32257 [2021-06-05 16:39:57,260 INFO L226 Difference]: Without dead ends: 32257 [2021-06-05 16:39:57,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 16:39:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32257 states. [2021-06-05 16:39:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32257 to 25533. [2021-06-05 16:39:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25533 states, 25532 states have (on average 3.8001331662227793) internal successors, (97025), 25532 states have internal predecessors, (97025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25533 states to 25533 states and 97025 transitions. [2021-06-05 16:39:57,851 INFO L78 Accepts]: Start accepts. Automaton has 25533 states and 97025 transitions. Word has length 28 [2021-06-05 16:39:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:57,851 INFO L482 AbstractCegarLoop]: Abstraction has 25533 states and 97025 transitions. [2021-06-05 16:39:57,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:57,851 INFO L276 IsEmpty]: Start isEmpty. Operand 25533 states and 97025 transitions. [2021-06-05 16:39:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:57,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:57,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:58,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:58,089 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 131 times [2021-06-05 16:39:58,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:58,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359618059] [2021-06-05 16:39:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:58,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:58,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359618059] [2021-06-05 16:39:58,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359618059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:58,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248561327] [2021-06-05 16:39:58,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:58,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:39:58,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:39:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:58,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248561327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:58,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:58,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:39:58,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021531819] [2021-06-05 16:39:58,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:39:58,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:58,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:39:58,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:39:58,200 INFO L87 Difference]: Start difference. First operand 25533 states and 97025 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:39:58,572 INFO L93 Difference]: Finished difference Result 32571 states and 122068 transitions. [2021-06-05 16:39:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:39:58,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:39:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:39:58,642 INFO L225 Difference]: With dead ends: 32571 [2021-06-05 16:39:58,643 INFO L226 Difference]: Without dead ends: 32571 [2021-06-05 16:39:58,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:39:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32571 states. [2021-06-05 16:39:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32571 to 29359. [2021-06-05 16:39:59,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29359 states, 29358 states have (on average 3.814599087131276) internal successors, (111989), 29358 states have internal predecessors, (111989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:59,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29359 states to 29359 states and 111989 transitions. [2021-06-05 16:39:59,254 INFO L78 Accepts]: Start accepts. Automaton has 29359 states and 111989 transitions. Word has length 28 [2021-06-05 16:39:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:39:59,254 INFO L482 AbstractCegarLoop]: Abstraction has 29359 states and 111989 transitions. [2021-06-05 16:39:59,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:39:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 29359 states and 111989 transitions. [2021-06-05 16:39:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:39:59,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:39:59,301 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:39:59,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4107 [2021-06-05 16:39:59,501 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:39:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:39:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 132 times [2021-06-05 16:39:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:39:59,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513213075] [2021-06-05 16:39:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:39:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:39:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:59,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:39:59,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513213075] [2021-06-05 16:39:59,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513213075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:59,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834456250] [2021-06-05 16:39:59,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:39:59,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:39:59,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:39:59,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:39:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:39:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:39:59,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834456250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:39:59,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:39:59,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:39:59,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453615038] [2021-06-05 16:39:59,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:39:59,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:39:59,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:39:59,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:39:59,618 INFO L87 Difference]: Start difference. First operand 29359 states and 111989 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:00,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:00,301 INFO L93 Difference]: Finished difference Result 35770 states and 133277 transitions. [2021-06-05 16:40:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:40:00,302 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:00,383 INFO L225 Difference]: With dead ends: 35770 [2021-06-05 16:40:00,383 INFO L226 Difference]: Without dead ends: 35762 [2021-06-05 16:40:00,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:40:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35762 states. [2021-06-05 16:40:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35762 to 29325. [2021-06-05 16:40:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29325 states, 29324 states have (on average 3.8150320556540716) internal successors, (111872), 29324 states have internal predecessors, (111872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29325 states to 29325 states and 111872 transitions. [2021-06-05 16:40:01,045 INFO L78 Accepts]: Start accepts. Automaton has 29325 states and 111872 transitions. Word has length 28 [2021-06-05 16:40:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:01,045 INFO L482 AbstractCegarLoop]: Abstraction has 29325 states and 111872 transitions. [2021-06-05 16:40:01,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 29325 states and 111872 transitions. [2021-06-05 16:40:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:01,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:01,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:01,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4108 [2021-06-05 16:40:01,293 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 133 times [2021-06-05 16:40:01,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:01,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678667257] [2021-06-05 16:40:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:01,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:01,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678667257] [2021-06-05 16:40:01,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678667257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:01,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366784705] [2021-06-05 16:40:01,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:01,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366784705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:01,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:01,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:40:01,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910586864] [2021-06-05 16:40:01,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:40:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:40:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:40:01,402 INFO L87 Difference]: Start difference. First operand 29325 states and 111872 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:01,866 INFO L93 Difference]: Finished difference Result 32332 states and 121875 transitions. [2021-06-05 16:40:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:40:01,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:01,946 INFO L225 Difference]: With dead ends: 32332 [2021-06-05 16:40:01,946 INFO L226 Difference]: Without dead ends: 32332 [2021-06-05 16:40:01,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:40:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32332 states. [2021-06-05 16:40:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32332 to 29928. [2021-06-05 16:40:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29928 states, 29927 states have (on average 3.812978247067865) internal successors, (114111), 29927 states have internal predecessors, (114111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:02,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29928 states to 29928 states and 114111 transitions. [2021-06-05 16:40:02,553 INFO L78 Accepts]: Start accepts. Automaton has 29928 states and 114111 transitions. Word has length 28 [2021-06-05 16:40:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:02,553 INFO L482 AbstractCegarLoop]: Abstraction has 29928 states and 114111 transitions. [2021-06-05 16:40:02,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:02,553 INFO L276 IsEmpty]: Start isEmpty. Operand 29928 states and 114111 transitions. [2021-06-05 16:40:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:02,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:02,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:02,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:02,825 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:02,825 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 134 times [2021-06-05 16:40:02,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:02,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797253410] [2021-06-05 16:40:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:02,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:02,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797253410] [2021-06-05 16:40:02,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797253410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:02,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304656420] [2021-06-05 16:40:02,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:02,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:02,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304656420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:02,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:02,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 16:40:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012795651] [2021-06-05 16:40:02,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:40:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:40:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:40:02,961 INFO L87 Difference]: Start difference. First operand 29928 states and 114111 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:03,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:03,566 INFO L93 Difference]: Finished difference Result 36766 states and 136935 transitions. [2021-06-05 16:40:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:40:03,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:03,651 INFO L225 Difference]: With dead ends: 36766 [2021-06-05 16:40:03,651 INFO L226 Difference]: Without dead ends: 36742 [2021-06-05 16:40:03,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:40:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36742 states. [2021-06-05 16:40:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36742 to 30100. [2021-06-05 16:40:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30100 states, 30099 states have (on average 3.8089305292534634) internal successors, (114645), 30099 states have internal predecessors, (114645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30100 states to 30100 states and 114645 transitions. [2021-06-05 16:40:04,470 INFO L78 Accepts]: Start accepts. Automaton has 30100 states and 114645 transitions. Word has length 28 [2021-06-05 16:40:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:04,470 INFO L482 AbstractCegarLoop]: Abstraction has 30100 states and 114645 transitions. [2021-06-05 16:40:04,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30100 states and 114645 transitions. [2021-06-05 16:40:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:04,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:04,519 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:04,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-06-05 16:40:04,720 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:04,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 135 times [2021-06-05 16:40:04,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:04,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913408775] [2021-06-05 16:40:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:04,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:04,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913408775] [2021-06-05 16:40:04,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913408775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:04,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091263324] [2021-06-05 16:40:04,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:04,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:40:04,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:40:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:04,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091263324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:04,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:04,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 16:40:04,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635049168] [2021-06-05 16:40:04,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:40:04,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:04,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:40:04,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:40:04,853 INFO L87 Difference]: Start difference. First operand 30100 states and 114645 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:05,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:05,363 INFO L93 Difference]: Finished difference Result 32808 states and 123611 transitions. [2021-06-05 16:40:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:40:05,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:05,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:05,440 INFO L225 Difference]: With dead ends: 32808 [2021-06-05 16:40:05,441 INFO L226 Difference]: Without dead ends: 32808 [2021-06-05 16:40:05,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:40:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32808 states. [2021-06-05 16:40:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32808 to 30021. [2021-06-05 16:40:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30021 states, 30020 states have (on average 3.8105929380413057) internal successors, (114394), 30020 states have internal predecessors, (114394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30021 states to 30021 states and 114394 transitions. [2021-06-05 16:40:06,069 INFO L78 Accepts]: Start accepts. Automaton has 30021 states and 114394 transitions. Word has length 28 [2021-06-05 16:40:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:06,069 INFO L482 AbstractCegarLoop]: Abstraction has 30021 states and 114394 transitions. [2021-06-05 16:40:06,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 30021 states and 114394 transitions. [2021-06-05 16:40:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:06,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:06,127 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:06,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4111,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:06,327 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 136 times [2021-06-05 16:40:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:06,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263563869] [2021-06-05 16:40:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:06,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:06,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263563869] [2021-06-05 16:40:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263563869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:06,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30381731] [2021-06-05 16:40:06,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:06,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:06,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:06,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30381731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:06,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:06,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 16:40:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727424139] [2021-06-05 16:40:06,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:40:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:40:06,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:40:06,450 INFO L87 Difference]: Start difference. First operand 30021 states and 114394 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:07,121 INFO L93 Difference]: Finished difference Result 36684 states and 136681 transitions. [2021-06-05 16:40:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:40:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:07,220 INFO L225 Difference]: With dead ends: 36684 [2021-06-05 16:40:07,220 INFO L226 Difference]: Without dead ends: 36644 [2021-06-05 16:40:07,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:40:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36644 states. [2021-06-05 16:40:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36644 to 30177. [2021-06-05 16:40:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30177 states, 30176 states have (on average 3.806733828207847) internal successors, (114872), 30176 states have internal predecessors, (114872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30177 states to 30177 states and 114872 transitions. [2021-06-05 16:40:08,019 INFO L78 Accepts]: Start accepts. Automaton has 30177 states and 114872 transitions. Word has length 28 [2021-06-05 16:40:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:08,019 INFO L482 AbstractCegarLoop]: Abstraction has 30177 states and 114872 transitions. [2021-06-05 16:40:08,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30177 states and 114872 transitions. [2021-06-05 16:40:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:08,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:08,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:08,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-06-05 16:40:08,267 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:08,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 137 times [2021-06-05 16:40:08,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:08,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650058458] [2021-06-05 16:40:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:08,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:08,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650058458] [2021-06-05 16:40:08,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650058458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:08,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541745466] [2021-06-05 16:40:08,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:08,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:08,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:08,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541745466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:08,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:08,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:08,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096590904] [2021-06-05 16:40:08,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:08,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:08,431 INFO L87 Difference]: Start difference. First operand 30177 states and 114872 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:09,860 INFO L93 Difference]: Finished difference Result 68717 states and 253109 transitions. [2021-06-05 16:40:09,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:40:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:10,052 INFO L225 Difference]: With dead ends: 68717 [2021-06-05 16:40:10,052 INFO L226 Difference]: Without dead ends: 68717 [2021-06-05 16:40:10,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:40:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68717 states. [2021-06-05 16:40:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68717 to 37968. [2021-06-05 16:40:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37968 states, 37967 states have (on average 3.8875075723654753) internal successors, (147597), 37967 states have internal predecessors, (147597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37968 states to 37968 states and 147597 transitions. [2021-06-05 16:40:11,757 INFO L78 Accepts]: Start accepts. Automaton has 37968 states and 147597 transitions. Word has length 28 [2021-06-05 16:40:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:11,757 INFO L482 AbstractCegarLoop]: Abstraction has 37968 states and 147597 transitions. [2021-06-05 16:40:11,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 37968 states and 147597 transitions. [2021-06-05 16:40:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:11,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:11,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:12,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:12,065 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:12,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:12,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 138 times [2021-06-05 16:40:12,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:12,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809772653] [2021-06-05 16:40:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:12,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809772653] [2021-06-05 16:40:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809772653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359488470] [2021-06-05 16:40:12,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:12,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:12,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:12,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:12,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359488470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:12,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:12,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:12,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632500480] [2021-06-05 16:40:12,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:12,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:12,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:12,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:12,226 INFO L87 Difference]: Start difference. First operand 37968 states and 147597 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:13,770 INFO L93 Difference]: Finished difference Result 68090 states and 251448 transitions. [2021-06-05 16:40:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:40:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:13,979 INFO L225 Difference]: With dead ends: 68090 [2021-06-05 16:40:13,979 INFO L226 Difference]: Without dead ends: 68090 [2021-06-05 16:40:13,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 679.8ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:40:14,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68090 states. [2021-06-05 16:40:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68090 to 37965. [2021-06-05 16:40:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37965 states, 37964 states have (on average 3.8874460014750816) internal successors, (147583), 37964 states have internal predecessors, (147583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37965 states to 37965 states and 147583 transitions. [2021-06-05 16:40:15,689 INFO L78 Accepts]: Start accepts. Automaton has 37965 states and 147583 transitions. Word has length 28 [2021-06-05 16:40:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:15,689 INFO L482 AbstractCegarLoop]: Abstraction has 37965 states and 147583 transitions. [2021-06-05 16:40:15,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:15,690 INFO L276 IsEmpty]: Start isEmpty. Operand 37965 states and 147583 transitions. [2021-06-05 16:40:15,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:15,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:15,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:15,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4114,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:15,961 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 139 times [2021-06-05 16:40:15,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:15,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250810695] [2021-06-05 16:40:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:16,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250810695] [2021-06-05 16:40:16,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250810695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220656394] [2021-06-05 16:40:16,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:16,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:16,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:16,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220656394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:16,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:16,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:40:16,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646981870] [2021-06-05 16:40:16,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:16,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:16,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:16,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:16,356 INFO L87 Difference]: Start difference. First operand 37965 states and 147583 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:17,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:17,706 INFO L93 Difference]: Finished difference Result 63470 states and 235834 transitions. [2021-06-05 16:40:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:40:17,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:17,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:17,917 INFO L225 Difference]: With dead ends: 63470 [2021-06-05 16:40:17,917 INFO L226 Difference]: Without dead ends: 63470 [2021-06-05 16:40:17,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 638.7ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:40:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63470 states. [2021-06-05 16:40:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63470 to 37989. [2021-06-05 16:40:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37989 states, 37988 states have (on average 3.8877277034853113) internal successors, (147687), 37988 states have internal predecessors, (147687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37989 states to 37989 states and 147687 transitions. [2021-06-05 16:40:19,433 INFO L78 Accepts]: Start accepts. Automaton has 37989 states and 147687 transitions. Word has length 28 [2021-06-05 16:40:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:19,433 INFO L482 AbstractCegarLoop]: Abstraction has 37989 states and 147687 transitions. [2021-06-05 16:40:19,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37989 states and 147687 transitions. [2021-06-05 16:40:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:19,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:19,500 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:19,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4115,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:19,701 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:19,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 140 times [2021-06-05 16:40:19,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:19,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569500155] [2021-06-05 16:40:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:19,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:19,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569500155] [2021-06-05 16:40:19,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569500155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:19,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39893543] [2021-06-05 16:40:19,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:19,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:19,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:19,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39893543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:19,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:19,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:40:19,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606359501] [2021-06-05 16:40:19,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:19,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:19,848 INFO L87 Difference]: Start difference. First operand 37989 states and 147687 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:21,199 INFO L93 Difference]: Finished difference Result 62601 states and 233589 transitions. [2021-06-05 16:40:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:40:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:21,385 INFO L225 Difference]: With dead ends: 62601 [2021-06-05 16:40:21,385 INFO L226 Difference]: Without dead ends: 62593 [2021-06-05 16:40:21,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 531.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:40:21,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62593 states. [2021-06-05 16:40:22,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62593 to 37989. [2021-06-05 16:40:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37989 states, 37988 states have (on average 3.8875697588712224) internal successors, (147681), 37988 states have internal predecessors, (147681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:22,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37989 states to 37989 states and 147681 transitions. [2021-06-05 16:40:22,835 INFO L78 Accepts]: Start accepts. Automaton has 37989 states and 147681 transitions. Word has length 28 [2021-06-05 16:40:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:22,835 INFO L482 AbstractCegarLoop]: Abstraction has 37989 states and 147681 transitions. [2021-06-05 16:40:22,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 37989 states and 147681 transitions. [2021-06-05 16:40:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:22,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:22,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:23,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4116,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:23,093 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:23,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 141 times [2021-06-05 16:40:23,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:23,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264792780] [2021-06-05 16:40:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:23,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:23,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264792780] [2021-06-05 16:40:23,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264792780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:23,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124205733] [2021-06-05 16:40:23,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:23,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:40:23,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:23,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124205733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:23,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:23,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:23,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456100409] [2021-06-05 16:40:23,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:23,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:23,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:23,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:23,463 INFO L87 Difference]: Start difference. First operand 37989 states and 147681 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:24,842 INFO L93 Difference]: Finished difference Result 62283 states and 232726 transitions. [2021-06-05 16:40:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:40:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:25,041 INFO L225 Difference]: With dead ends: 62283 [2021-06-05 16:40:25,041 INFO L226 Difference]: Without dead ends: 62283 [2021-06-05 16:40:25,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 766.3ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:40:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62283 states. [2021-06-05 16:40:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62283 to 37997. [2021-06-05 16:40:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37997 states, 37996 states have (on average 3.8876460680071587) internal successors, (147715), 37996 states have internal predecessors, (147715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37997 states to 37997 states and 147715 transitions. [2021-06-05 16:40:26,434 INFO L78 Accepts]: Start accepts. Automaton has 37997 states and 147715 transitions. Word has length 28 [2021-06-05 16:40:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:26,434 INFO L482 AbstractCegarLoop]: Abstraction has 37997 states and 147715 transitions. [2021-06-05 16:40:26,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37997 states and 147715 transitions. [2021-06-05 16:40:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:26,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:26,503 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:26,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4117 [2021-06-05 16:40:26,703 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:26,704 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 142 times [2021-06-05 16:40:26,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:26,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802502669] [2021-06-05 16:40:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:26,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802502669] [2021-06-05 16:40:26,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802502669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:26,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669836000] [2021-06-05 16:40:26,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:26,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:26,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:27,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669836000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:27,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:27,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:27,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171631234] [2021-06-05 16:40:27,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:27,126 INFO L87 Difference]: Start difference. First operand 37997 states and 147715 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:28,183 INFO L93 Difference]: Finished difference Result 62072 states and 232200 transitions. [2021-06-05 16:40:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:40:28,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:28,339 INFO L225 Difference]: With dead ends: 62072 [2021-06-05 16:40:28,340 INFO L226 Difference]: Without dead ends: 62064 [2021-06-05 16:40:28,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:40:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62064 states. [2021-06-05 16:40:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62064 to 37997. [2021-06-05 16:40:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37997 states, 37996 states have (on average 3.887593430887462) internal successors, (147713), 37996 states have internal predecessors, (147713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37997 states to 37997 states and 147713 transitions. [2021-06-05 16:40:29,813 INFO L78 Accepts]: Start accepts. Automaton has 37997 states and 147713 transitions. Word has length 28 [2021-06-05 16:40:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:29,813 INFO L482 AbstractCegarLoop]: Abstraction has 37997 states and 147713 transitions. [2021-06-05 16:40:29,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 37997 states and 147713 transitions. [2021-06-05 16:40:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:29,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:29,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:30,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:30,082 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 143 times [2021-06-05 16:40:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:30,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559968505] [2021-06-05 16:40:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:30,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:30,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559968505] [2021-06-05 16:40:30,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559968505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:30,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307267314] [2021-06-05 16:40:30,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:30,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:40:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:30,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:30,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:30,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307267314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:30,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:30,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:40:30,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840001102] [2021-06-05 16:40:30,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:30,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:30,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:30,255 INFO L87 Difference]: Start difference. First operand 37997 states and 147713 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:31,661 INFO L93 Difference]: Finished difference Result 61433 states and 228496 transitions. [2021-06-05 16:40:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:40:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:31,844 INFO L225 Difference]: With dead ends: 61433 [2021-06-05 16:40:31,844 INFO L226 Difference]: Without dead ends: 61433 [2021-06-05 16:40:31,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:40:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61433 states. [2021-06-05 16:40:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61433 to 40835. [2021-06-05 16:40:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40835 states, 40834 states have (on average 3.891022187392859) internal successors, (158886), 40834 states have internal predecessors, (158886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40835 states to 40835 states and 158886 transitions. [2021-06-05 16:40:33,365 INFO L78 Accepts]: Start accepts. Automaton has 40835 states and 158886 transitions. Word has length 28 [2021-06-05 16:40:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:33,365 INFO L482 AbstractCegarLoop]: Abstraction has 40835 states and 158886 transitions. [2021-06-05 16:40:33,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:33,365 INFO L276 IsEmpty]: Start isEmpty. Operand 40835 states and 158886 transitions. [2021-06-05 16:40:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:33,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:33,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:33,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:33,636 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:33,636 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 144 times [2021-06-05 16:40:33,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:33,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380256982] [2021-06-05 16:40:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:33,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:33,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380256982] [2021-06-05 16:40:33,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380256982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:33,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401817520] [2021-06-05 16:40:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:33,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:40:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401817520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:33,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:33,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:40:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285180651] [2021-06-05 16:40:33,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:33,790 INFO L87 Difference]: Start difference. First operand 40835 states and 158886 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:35,103 INFO L93 Difference]: Finished difference Result 60949 states and 227223 transitions. [2021-06-05 16:40:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 16:40:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:35,282 INFO L225 Difference]: With dead ends: 60949 [2021-06-05 16:40:35,283 INFO L226 Difference]: Without dead ends: 60941 [2021-06-05 16:40:35,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 528.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:40:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60941 states. [2021-06-05 16:40:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60941 to 40523. [2021-06-05 16:40:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40523 states, 40522 states have (on average 3.8970929371699325) internal successors, (157918), 40522 states have internal predecessors, (157918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:36,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40523 states to 40523 states and 157918 transitions. [2021-06-05 16:40:36,811 INFO L78 Accepts]: Start accepts. Automaton has 40523 states and 157918 transitions. Word has length 28 [2021-06-05 16:40:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:36,812 INFO L482 AbstractCegarLoop]: Abstraction has 40523 states and 157918 transitions. [2021-06-05 16:40:36,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 40523 states and 157918 transitions. [2021-06-05 16:40:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:36,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:36,879 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:37,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 16:40:37,085 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 145 times [2021-06-05 16:40:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:37,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532292163] [2021-06-05 16:40:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:37,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532292163] [2021-06-05 16:40:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532292163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:37,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634710872] [2021-06-05 16:40:37,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:37,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634710872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:37,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:37,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 16:40:37,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989999789] [2021-06-05 16:40:37,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:37,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:37,222 INFO L87 Difference]: Start difference. First operand 40523 states and 157918 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:38,306 INFO L93 Difference]: Finished difference Result 59492 states and 223219 transitions. [2021-06-05 16:40:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:40:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:38,471 INFO L225 Difference]: With dead ends: 59492 [2021-06-05 16:40:38,472 INFO L226 Difference]: Without dead ends: 59468 [2021-06-05 16:40:38,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:40:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59468 states. [2021-06-05 16:40:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59468 to 40429. [2021-06-05 16:40:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40429 states, 40428 states have (on average 3.8969278717720393) internal successors, (157545), 40428 states have internal predecessors, (157545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40429 states to 40429 states and 157545 transitions. [2021-06-05 16:40:40,037 INFO L78 Accepts]: Start accepts. Automaton has 40429 states and 157545 transitions. Word has length 28 [2021-06-05 16:40:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:40,037 INFO L482 AbstractCegarLoop]: Abstraction has 40429 states and 157545 transitions. [2021-06-05 16:40:40,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 40429 states and 157545 transitions. [2021-06-05 16:40:40,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:40,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:40,113 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:40,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4121,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:40,314 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:40,314 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 146 times [2021-06-05 16:40:40,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:40,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308656199] [2021-06-05 16:40:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:40,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308656199] [2021-06-05 16:40:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308656199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581027105] [2021-06-05 16:40:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:40,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:40:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:40,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581027105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:40,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:40,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:40,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709683104] [2021-06-05 16:40:40,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:40,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:40,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:40,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:40,487 INFO L87 Difference]: Start difference. First operand 40429 states and 157545 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:41,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:41,769 INFO L93 Difference]: Finished difference Result 60725 states and 226603 transitions. [2021-06-05 16:40:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 16:40:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:41,951 INFO L225 Difference]: With dead ends: 60725 [2021-06-05 16:40:41,951 INFO L226 Difference]: Without dead ends: 60725 [2021-06-05 16:40:41,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:40:42,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60725 states. [2021-06-05 16:40:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60725 to 40525. [2021-06-05 16:40:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40525 states, 40524 states have (on average 3.8954446747606357) internal successors, (157859), 40524 states have internal predecessors, (157859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40525 states to 40525 states and 157859 transitions. [2021-06-05 16:40:43,419 INFO L78 Accepts]: Start accepts. Automaton has 40525 states and 157859 transitions. Word has length 28 [2021-06-05 16:40:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:43,419 INFO L482 AbstractCegarLoop]: Abstraction has 40525 states and 157859 transitions. [2021-06-05 16:40:43,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 40525 states and 157859 transitions. [2021-06-05 16:40:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:43,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:43,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:43,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-06-05 16:40:43,689 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 147 times [2021-06-05 16:40:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:43,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309749852] [2021-06-05 16:40:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:43,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309749852] [2021-06-05 16:40:43,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309749852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:43,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940965218] [2021-06-05 16:40:43,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:43,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:40:43,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:43,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:43,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:43,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940965218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:43,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:43,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 16:40:43,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662446035] [2021-06-05 16:40:43,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:40:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:40:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:40:43,847 INFO L87 Difference]: Start difference. First operand 40525 states and 157859 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:44,854 INFO L93 Difference]: Finished difference Result 60415 states and 225723 transitions. [2021-06-05 16:40:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 16:40:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:45,327 INFO L225 Difference]: With dead ends: 60415 [2021-06-05 16:40:45,327 INFO L226 Difference]: Without dead ends: 60407 [2021-06-05 16:40:45,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:40:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60407 states. [2021-06-05 16:40:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60407 to 40457. [2021-06-05 16:40:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40456 states have (on average 3.8967520268934153) internal successors, (157647), 40456 states have internal predecessors, (157647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 157647 transitions. [2021-06-05 16:40:46,727 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 157647 transitions. Word has length 28 [2021-06-05 16:40:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:46,727 INFO L482 AbstractCegarLoop]: Abstraction has 40457 states and 157647 transitions. [2021-06-05 16:40:46,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 157647 transitions. [2021-06-05 16:40:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:46,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:46,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:46,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-06-05 16:40:46,998 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 148 times [2021-06-05 16:40:46,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:46,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627455127] [2021-06-05 16:40:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:40:47,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627455127] [2021-06-05 16:40:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627455127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985728329] [2021-06-05 16:40:47,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:47,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:40:47,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:47,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985728329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:47,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:47,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 16:40:47,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208109064] [2021-06-05 16:40:47,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:40:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:40:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:40:47,153 INFO L87 Difference]: Start difference. First operand 40457 states and 157647 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:48,112 INFO L93 Difference]: Finished difference Result 59146 states and 222212 transitions. [2021-06-05 16:40:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:40:48,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:48,584 INFO L225 Difference]: With dead ends: 59146 [2021-06-05 16:40:48,584 INFO L226 Difference]: Without dead ends: 59122 [2021-06-05 16:40:48,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:40:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59122 states. [2021-06-05 16:40:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59122 to 40433. [2021-06-05 16:40:49,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40433 states, 40432 states have (on average 3.896888603086664) internal successors, (157559), 40432 states have internal predecessors, (157559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40433 states to 40433 states and 157559 transitions. [2021-06-05 16:40:49,868 INFO L78 Accepts]: Start accepts. Automaton has 40433 states and 157559 transitions. Word has length 28 [2021-06-05 16:40:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:49,868 INFO L482 AbstractCegarLoop]: Abstraction has 40433 states and 157559 transitions. [2021-06-05 16:40:49,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40433 states and 157559 transitions. [2021-06-05 16:40:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:49,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:49,926 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:50,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:50,127 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:50,127 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 149 times [2021-06-05 16:40:50,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:50,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749890178] [2021-06-05 16:40:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:50,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749890178] [2021-06-05 16:40:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749890178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177410574] [2021-06-05 16:40:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:50,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:40:50,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:50,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:50,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:50,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177410574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:50,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:50,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:50,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443669019] [2021-06-05 16:40:50,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:50,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:50,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:50,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:50,265 INFO L87 Difference]: Start difference. First operand 40433 states and 157559 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:52,029 INFO L93 Difference]: Finished difference Result 62335 states and 231295 transitions. [2021-06-05 16:40:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 16:40:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:52,186 INFO L225 Difference]: With dead ends: 62335 [2021-06-05 16:40:52,186 INFO L226 Difference]: Without dead ends: 62335 [2021-06-05 16:40:52,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 16:40:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-06-05 16:40:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 44875. [2021-06-05 16:40:53,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44875 states, 44874 states have (on average 3.8457458662031465) internal successors, (172574), 44874 states have internal predecessors, (172574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44875 states to 44875 states and 172574 transitions. [2021-06-05 16:40:53,730 INFO L78 Accepts]: Start accepts. Automaton has 44875 states and 172574 transitions. Word has length 28 [2021-06-05 16:40:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:53,730 INFO L482 AbstractCegarLoop]: Abstraction has 44875 states and 172574 transitions. [2021-06-05 16:40:53,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 44875 states and 172574 transitions. [2021-06-05 16:40:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:53,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:53,796 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:53,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:53,996 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 150 times [2021-06-05 16:40:53,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:53,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950037561] [2021-06-05 16:40:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:54,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950037561] [2021-06-05 16:40:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950037561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156424440] [2021-06-05 16:40:54,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:54,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:40:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:40:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:54,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156424440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:54,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:54,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:54,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699233126] [2021-06-05 16:40:54,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:54,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:54,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:54,128 INFO L87 Difference]: Start difference. First operand 44875 states and 172574 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:55,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:55,625 INFO L93 Difference]: Finished difference Result 61566 states and 229189 transitions. [2021-06-05 16:40:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 16:40:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:55,785 INFO L225 Difference]: With dead ends: 61566 [2021-06-05 16:40:55,785 INFO L226 Difference]: Without dead ends: 61558 [2021-06-05 16:40:55,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 16:40:55,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-05 16:40:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 43735. [2021-06-05 16:40:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43735 states, 43734 states have (on average 3.8648191338546667) internal successors, (169024), 43734 states have internal predecessors, (169024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43735 states to 43735 states and 169024 transitions. [2021-06-05 16:40:57,410 INFO L78 Accepts]: Start accepts. Automaton has 43735 states and 169024 transitions. Word has length 28 [2021-06-05 16:40:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:40:57,410 INFO L482 AbstractCegarLoop]: Abstraction has 43735 states and 169024 transitions. [2021-06-05 16:40:57,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 43735 states and 169024 transitions. [2021-06-05 16:40:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:40:57,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:40:57,487 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:40:57,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4126,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:57,687 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:40:57,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:40:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 151 times [2021-06-05 16:40:57,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:40:57,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793116289] [2021-06-05 16:40:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:40:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:57,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:40:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793116289] [2021-06-05 16:40:57,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793116289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:57,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429361219] [2021-06-05 16:40:57,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:40:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:40:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:40:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:40:57,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429361219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:40:57,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:40:57,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:40:57,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868873253] [2021-06-05 16:40:57,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:40:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:40:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:40:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:40:57,818 INFO L87 Difference]: Start difference. First operand 43735 states and 169024 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:40:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:40:58,925 INFO L93 Difference]: Finished difference Result 59917 states and 224585 transitions. [2021-06-05 16:40:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:40:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:40:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:40:59,080 INFO L225 Difference]: With dead ends: 59917 [2021-06-05 16:40:59,080 INFO L226 Difference]: Without dead ends: 59893 [2021-06-05 16:40:59,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:40:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59893 states. [2021-06-05 16:41:00,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59893 to 43743. [2021-06-05 16:41:00,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43743 states, 43742 states have (on average 3.8626948927803944) internal successors, (168962), 43742 states have internal predecessors, (168962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43743 states to 43743 states and 168962 transitions. [2021-06-05 16:41:00,779 INFO L78 Accepts]: Start accepts. Automaton has 43743 states and 168962 transitions. Word has length 28 [2021-06-05 16:41:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:00,779 INFO L482 AbstractCegarLoop]: Abstraction has 43743 states and 168962 transitions. [2021-06-05 16:41:00,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 43743 states and 168962 transitions. [2021-06-05 16:41:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:00,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:00,844 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:01,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:01,049 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 152 times [2021-06-05 16:41:01,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:01,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363698132] [2021-06-05 16:41:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:01,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:01,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363698132] [2021-06-05 16:41:01,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363698132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:01,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896088544] [2021-06-05 16:41:01,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:01,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:01,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:01,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896088544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:01,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:01,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 16:41:01,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851751434] [2021-06-05 16:41:01,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:41:01,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:01,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:41:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:41:01,179 INFO L87 Difference]: Start difference. First operand 43743 states and 168962 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:02,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:02,237 INFO L93 Difference]: Finished difference Result 61196 states and 228200 transitions. [2021-06-05 16:41:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:41:02,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:02,396 INFO L225 Difference]: With dead ends: 61196 [2021-06-05 16:41:02,396 INFO L226 Difference]: Without dead ends: 61156 [2021-06-05 16:41:02,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:41:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61156 states. [2021-06-05 16:41:03,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61156 to 43881. [2021-06-05 16:41:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43881 states, 43880 states have (on average 3.862010027347311) internal successors, (169465), 43880 states have internal predecessors, (169465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43881 states to 43881 states and 169465 transitions. [2021-06-05 16:41:03,985 INFO L78 Accepts]: Start accepts. Automaton has 43881 states and 169465 transitions. Word has length 28 [2021-06-05 16:41:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:03,986 INFO L482 AbstractCegarLoop]: Abstraction has 43881 states and 169465 transitions. [2021-06-05 16:41:03,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 43881 states and 169465 transitions. [2021-06-05 16:41:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:04,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:04,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:04,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:04,251 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:04,251 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 153 times [2021-06-05 16:41:04,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:04,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372144496] [2021-06-05 16:41:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:04,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:04,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372144496] [2021-06-05 16:41:04,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372144496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:04,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578108651] [2021-06-05 16:41:04,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:04,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:41:04,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:04,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578108651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:04,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:04,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:41:04,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201677276] [2021-06-05 16:41:04,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:41:04,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:41:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:41:04,418 INFO L87 Difference]: Start difference. First operand 43881 states and 169465 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:06,164 INFO L93 Difference]: Finished difference Result 60421 states and 225864 transitions. [2021-06-05 16:41:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:41:06,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:06,323 INFO L225 Difference]: With dead ends: 60421 [2021-06-05 16:41:06,323 INFO L226 Difference]: Without dead ends: 60421 [2021-06-05 16:41:06,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 849.0ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 16:41:06,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60421 states. [2021-06-05 16:41:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60421 to 44786. [2021-06-05 16:41:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44786 states, 44785 states have (on average 3.8525399129172713) internal successors, (172536), 44785 states have internal predecessors, (172536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44786 states to 44786 states and 172536 transitions. [2021-06-05 16:41:07,677 INFO L78 Accepts]: Start accepts. Automaton has 44786 states and 172536 transitions. Word has length 28 [2021-06-05 16:41:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:07,677 INFO L482 AbstractCegarLoop]: Abstraction has 44786 states and 172536 transitions. [2021-06-05 16:41:07,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 44786 states and 172536 transitions. [2021-06-05 16:41:07,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:07,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:07,743 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:07,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4129 [2021-06-05 16:41:07,944 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 154 times [2021-06-05 16:41:07,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:07,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261883921] [2021-06-05 16:41:07,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:07,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:07,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261883921] [2021-06-05 16:41:07,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261883921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:07,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891377584] [2021-06-05 16:41:07,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:08,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:08,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:08,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:08,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891377584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:08,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:08,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:41:08,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207913199] [2021-06-05 16:41:08,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:41:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:41:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:41:08,106 INFO L87 Difference]: Start difference. First operand 44786 states and 172536 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:09,698 INFO L93 Difference]: Finished difference Result 59926 states and 224477 transitions. [2021-06-05 16:41:09,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:41:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:09,859 INFO L225 Difference]: With dead ends: 59926 [2021-06-05 16:41:09,859 INFO L226 Difference]: Without dead ends: 59918 [2021-06-05 16:41:09,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 680.3ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:41:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59918 states. [2021-06-05 16:41:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59918 to 44710. [2021-06-05 16:41:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44710 states, 44709 states have (on average 3.8538101948153614) internal successors, (172300), 44709 states have internal predecessors, (172300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44710 states to 44710 states and 172300 transitions. [2021-06-05 16:41:11,193 INFO L78 Accepts]: Start accepts. Automaton has 44710 states and 172300 transitions. Word has length 28 [2021-06-05 16:41:11,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:11,193 INFO L482 AbstractCegarLoop]: Abstraction has 44710 states and 172300 transitions. [2021-06-05 16:41:11,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44710 states and 172300 transitions. [2021-06-05 16:41:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:11,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:11,258 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:11,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4130 [2021-06-05 16:41:11,461 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:11,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:11,461 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 155 times [2021-06-05 16:41:11,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:11,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131592501] [2021-06-05 16:41:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:11,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131592501] [2021-06-05 16:41:11,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131592501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:11,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876442846] [2021-06-05 16:41:11,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:11,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:41:11,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:11,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876442846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:11,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:11,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313613399] [2021-06-05 16:41:11,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:11,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:11,612 INFO L87 Difference]: Start difference. First operand 44710 states and 172300 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:13,050 INFO L93 Difference]: Finished difference Result 59403 states and 223231 transitions. [2021-06-05 16:41:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 16:41:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:13,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:13,267 INFO L225 Difference]: With dead ends: 59403 [2021-06-05 16:41:13,267 INFO L226 Difference]: Without dead ends: 59379 [2021-06-05 16:41:13,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 573.1ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:41:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59379 states. [2021-06-05 16:41:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59379 to 44696. [2021-06-05 16:41:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44696 states, 44695 states have (on average 3.8537867770444123) internal successors, (172245), 44695 states have internal predecessors, (172245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44696 states to 44696 states and 172245 transitions. [2021-06-05 16:41:14,700 INFO L78 Accepts]: Start accepts. Automaton has 44696 states and 172245 transitions. Word has length 28 [2021-06-05 16:41:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:14,700 INFO L482 AbstractCegarLoop]: Abstraction has 44696 states and 172245 transitions. [2021-06-05 16:41:14,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 44696 states and 172245 transitions. [2021-06-05 16:41:14,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:14,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:14,765 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:14,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4131 [2021-06-05 16:41:14,966 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:14,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:14,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 156 times [2021-06-05 16:41:14,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:14,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713664022] [2021-06-05 16:41:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:15,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:15,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713664022] [2021-06-05 16:41:15,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713664022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:15,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909742626] [2021-06-05 16:41:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:15,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:41:15,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:15,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:15,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909742626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:15,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:15,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 16:41:15,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629623173] [2021-06-05 16:41:15,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:15,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:15,107 INFO L87 Difference]: Start difference. First operand 44696 states and 172245 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:16,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:16,156 INFO L93 Difference]: Finished difference Result 59185 states and 222538 transitions. [2021-06-05 16:41:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 16:41:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:16,737 INFO L225 Difference]: With dead ends: 59185 [2021-06-05 16:41:16,737 INFO L226 Difference]: Without dead ends: 59145 [2021-06-05 16:41:16,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:41:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59145 states. [2021-06-05 16:41:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59145 to 45045. [2021-06-05 16:41:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45045 states, 45044 states have (on average 3.855652251132226) internal successors, (173674), 45044 states have internal predecessors, (173674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45045 states to 45045 states and 173674 transitions. [2021-06-05 16:41:18,167 INFO L78 Accepts]: Start accepts. Automaton has 45045 states and 173674 transitions. Word has length 28 [2021-06-05 16:41:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:18,167 INFO L482 AbstractCegarLoop]: Abstraction has 45045 states and 173674 transitions. [2021-06-05 16:41:18,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 45045 states and 173674 transitions. [2021-06-05 16:41:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:18,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:18,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:18,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4132 [2021-06-05 16:41:18,434 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:18,435 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 157 times [2021-06-05 16:41:18,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:18,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470276422] [2021-06-05 16:41:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:18,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:18,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470276422] [2021-06-05 16:41:18,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470276422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:18,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293203201] [2021-06-05 16:41:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:18,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:18,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:18,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293203201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:18,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:18,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:18,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138504130] [2021-06-05 16:41:18,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:18,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:18,623 INFO L87 Difference]: Start difference. First operand 45045 states and 173674 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:20,184 INFO L93 Difference]: Finished difference Result 71823 states and 267438 transitions. [2021-06-05 16:41:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:41:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:20,464 INFO L225 Difference]: With dead ends: 71823 [2021-06-05 16:41:20,465 INFO L226 Difference]: Without dead ends: 71823 [2021-06-05 16:41:20,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 16:41:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71823 states. [2021-06-05 16:41:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71823 to 46211. [2021-06-05 16:41:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46211 states, 46210 states have (on average 3.86991993075092) internal successors, (178829), 46210 states have internal predecessors, (178829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46211 states to 46211 states and 178829 transitions. [2021-06-05 16:41:21,978 INFO L78 Accepts]: Start accepts. Automaton has 46211 states and 178829 transitions. Word has length 28 [2021-06-05 16:41:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:21,978 INFO L482 AbstractCegarLoop]: Abstraction has 46211 states and 178829 transitions. [2021-06-05 16:41:21,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:21,979 INFO L276 IsEmpty]: Start isEmpty. Operand 46211 states and 178829 transitions. [2021-06-05 16:41:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:22,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:22,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:22,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-05 16:41:22,253 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 158 times [2021-06-05 16:41:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890197332] [2021-06-05 16:41:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:22,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:22,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890197332] [2021-06-05 16:41:22,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890197332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:22,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384376053] [2021-06-05 16:41:22,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:22,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:22,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:22,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384376053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:22,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:22,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:22,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323975821] [2021-06-05 16:41:22,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:22,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:22,412 INFO L87 Difference]: Start difference. First operand 46211 states and 178829 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:23,913 INFO L93 Difference]: Finished difference Result 65877 states and 248593 transitions. [2021-06-05 16:41:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 16:41:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:24,110 INFO L225 Difference]: With dead ends: 65877 [2021-06-05 16:41:24,110 INFO L226 Difference]: Without dead ends: 65877 [2021-06-05 16:41:24,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 16:41:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65877 states. [2021-06-05 16:41:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65877 to 46241. [2021-06-05 16:41:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46241 states, 46240 states have (on average 3.8697231833910033) internal successors, (178936), 46240 states have internal predecessors, (178936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46241 states to 46241 states and 178936 transitions. [2021-06-05 16:41:25,590 INFO L78 Accepts]: Start accepts. Automaton has 46241 states and 178936 transitions. Word has length 28 [2021-06-05 16:41:25,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:25,590 INFO L482 AbstractCegarLoop]: Abstraction has 46241 states and 178936 transitions. [2021-06-05 16:41:25,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 46241 states and 178936 transitions. [2021-06-05 16:41:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:25,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:25,658 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:25,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-05 16:41:25,859 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:25,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 159 times [2021-06-05 16:41:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:25,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612229206] [2021-06-05 16:41:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:25,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612229206] [2021-06-05 16:41:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612229206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:25,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783164605] [2021-06-05 16:41:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:25,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:41:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783164605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:26,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:26,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:41:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382856998] [2021-06-05 16:41:26,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:41:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:41:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:41:26,026 INFO L87 Difference]: Start difference. First operand 46241 states and 178936 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:28,027 INFO L93 Difference]: Finished difference Result 66732 states and 251021 transitions. [2021-06-05 16:41:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 16:41:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:28,216 INFO L225 Difference]: With dead ends: 66732 [2021-06-05 16:41:28,216 INFO L226 Difference]: Without dead ends: 66732 [2021-06-05 16:41:28,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 1219.6ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 16:41:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66732 states. [2021-06-05 16:41:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66732 to 46505. [2021-06-05 16:41:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46505 states, 46504 states have (on average 3.8662050576294513) internal successors, (179794), 46504 states have internal predecessors, (179794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46505 states to 46505 states and 179794 transitions. [2021-06-05 16:41:29,745 INFO L78 Accepts]: Start accepts. Automaton has 46505 states and 179794 transitions. Word has length 28 [2021-06-05 16:41:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:29,745 INFO L482 AbstractCegarLoop]: Abstraction has 46505 states and 179794 transitions. [2021-06-05 16:41:29,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 46505 states and 179794 transitions. [2021-06-05 16:41:29,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:29,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:29,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:30,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:30,014 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 160 times [2021-06-05 16:41:30,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:30,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843894957] [2021-06-05 16:41:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:30,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843894957] [2021-06-05 16:41:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843894957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:30,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475147912] [2021-06-05 16:41:30,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:30,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:30,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475147912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:30,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:30,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 16:41:30,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613397095] [2021-06-05 16:41:30,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:41:30,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:30,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:41:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:41:30,173 INFO L87 Difference]: Start difference. First operand 46505 states and 179794 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:30,944 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 16:41:31,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:31,816 INFO L93 Difference]: Finished difference Result 65947 states and 248794 transitions. [2021-06-05 16:41:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 16:41:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:31,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:31,990 INFO L225 Difference]: With dead ends: 65947 [2021-06-05 16:41:31,990 INFO L226 Difference]: Without dead ends: 65943 [2021-06-05 16:41:31,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1023.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:41:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65943 states. [2021-06-05 16:41:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65943 to 46141. [2021-06-05 16:41:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46141 states, 46140 states have (on average 3.8699176419592543) internal successors, (178558), 46140 states have internal predecessors, (178558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46141 states to 46141 states and 178558 transitions. [2021-06-05 16:41:33,448 INFO L78 Accepts]: Start accepts. Automaton has 46141 states and 178558 transitions. Word has length 28 [2021-06-05 16:41:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:33,448 INFO L482 AbstractCegarLoop]: Abstraction has 46141 states and 178558 transitions. [2021-06-05 16:41:33,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 46141 states and 178558 transitions. [2021-06-05 16:41:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:33,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:33,518 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:33,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4136,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:33,719 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:33,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 161 times [2021-06-05 16:41:33,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:33,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258110396] [2021-06-05 16:41:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:33,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:33,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258110396] [2021-06-05 16:41:33,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258110396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:33,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887019548] [2021-06-05 16:41:33,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:33,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:41:33,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:33,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:34,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887019548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:34,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:34,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:34,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290610653] [2021-06-05 16:41:34,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:34,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:34,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:34,189 INFO L87 Difference]: Start difference. First operand 46141 states and 178558 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:35,152 INFO L93 Difference]: Finished difference Result 60232 states and 229011 transitions. [2021-06-05 16:41:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:41:35,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:35,311 INFO L225 Difference]: With dead ends: 60232 [2021-06-05 16:41:35,311 INFO L226 Difference]: Without dead ends: 60232 [2021-06-05 16:41:35,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:41:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60232 states. [2021-06-05 16:41:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60232 to 46157. [2021-06-05 16:41:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46157 states, 46156 states have (on average 3.8717826501429933) internal successors, (178706), 46156 states have internal predecessors, (178706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46157 states to 46157 states and 178706 transitions. [2021-06-05 16:41:36,662 INFO L78 Accepts]: Start accepts. Automaton has 46157 states and 178706 transitions. Word has length 28 [2021-06-05 16:41:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:36,662 INFO L482 AbstractCegarLoop]: Abstraction has 46157 states and 178706 transitions. [2021-06-05 16:41:36,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:36,662 INFO L276 IsEmpty]: Start isEmpty. Operand 46157 states and 178706 transitions. [2021-06-05 16:41:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:36,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:36,730 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:36,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:36,931 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:36,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 162 times [2021-06-05 16:41:36,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:36,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987888242] [2021-06-05 16:41:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:36,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:36,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987888242] [2021-06-05 16:41:36,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987888242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:36,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208946246] [2021-06-05 16:41:36,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:37,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:41:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:37,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208946246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:37,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:37,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:37,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399152636] [2021-06-05 16:41:37,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:37,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:37,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:37,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:37,106 INFO L87 Difference]: Start difference. First operand 46157 states and 178706 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:38,079 INFO L93 Difference]: Finished difference Result 59549 states and 227144 transitions. [2021-06-05 16:41:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:41:38,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:38,241 INFO L225 Difference]: With dead ends: 59549 [2021-06-05 16:41:38,242 INFO L226 Difference]: Without dead ends: 59537 [2021-06-05 16:41:38,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:41:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59537 states. [2021-06-05 16:41:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59537 to 46091. [2021-06-05 16:41:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46091 states, 46090 states have (on average 3.8729225428509437) internal successors, (178503), 46090 states have internal predecessors, (178503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46091 states to 46091 states and 178503 transitions. [2021-06-05 16:41:39,544 INFO L78 Accepts]: Start accepts. Automaton has 46091 states and 178503 transitions. Word has length 28 [2021-06-05 16:41:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:39,544 INFO L482 AbstractCegarLoop]: Abstraction has 46091 states and 178503 transitions. [2021-06-05 16:41:39,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 46091 states and 178503 transitions. [2021-06-05 16:41:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:39,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:39,614 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:39,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4138 [2021-06-05 16:41:39,815 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:39,815 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 163 times [2021-06-05 16:41:39,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:39,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857347997] [2021-06-05 16:41:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:39,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857347997] [2021-06-05 16:41:39,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857347997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303454187] [2021-06-05 16:41:39,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:39,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:39,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:39,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303454187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:39,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:39,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 16:41:39,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352009160] [2021-06-05 16:41:39,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 16:41:39,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:39,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 16:41:39,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 16:41:39,972 INFO L87 Difference]: Start difference. First operand 46091 states and 178503 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:41,003 INFO L93 Difference]: Finished difference Result 50569 states and 193277 transitions. [2021-06-05 16:41:41,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:41:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:41,151 INFO L225 Difference]: With dead ends: 50569 [2021-06-05 16:41:41,152 INFO L226 Difference]: Without dead ends: 50569 [2021-06-05 16:41:41,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:41:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50569 states. [2021-06-05 16:41:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50569 to 46299. [2021-06-05 16:41:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46299 states, 46298 states have (on average 3.8704695667199447) internal successors, (179195), 46298 states have internal predecessors, (179195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46299 states to 46299 states and 179195 transitions. [2021-06-05 16:41:42,413 INFO L78 Accepts]: Start accepts. Automaton has 46299 states and 179195 transitions. Word has length 28 [2021-06-05 16:41:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:42,413 INFO L482 AbstractCegarLoop]: Abstraction has 46299 states and 179195 transitions. [2021-06-05 16:41:42,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 46299 states and 179195 transitions. [2021-06-05 16:41:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:42,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:42,482 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:42,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:42,682 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 164 times [2021-06-05 16:41:42,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:42,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647973828] [2021-06-05 16:41:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:42,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647973828] [2021-06-05 16:41:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647973828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417854891] [2021-06-05 16:41:42,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:42,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:42,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:42,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417854891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:42,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:42,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 16:41:42,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160213675] [2021-06-05 16:41:42,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:41:42,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:42,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:41:42,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:41:42,848 INFO L87 Difference]: Start difference. First operand 46299 states and 179195 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:43,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:43,412 INFO L93 Difference]: Finished difference Result 50416 states and 192879 transitions. [2021-06-05 16:41:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:41:43,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:43,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:43,542 INFO L225 Difference]: With dead ends: 50416 [2021-06-05 16:41:43,542 INFO L226 Difference]: Without dead ends: 50412 [2021-06-05 16:41:43,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:41:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50412 states. [2021-06-05 16:41:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50412 to 46239. [2021-06-05 16:41:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46239 states, 46238 states have (on average 3.8713395908127515) internal successors, (179003), 46238 states have internal predecessors, (179003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46239 states to 46239 states and 179003 transitions. [2021-06-05 16:41:44,840 INFO L78 Accepts]: Start accepts. Automaton has 46239 states and 179003 transitions. Word has length 28 [2021-06-05 16:41:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:44,840 INFO L482 AbstractCegarLoop]: Abstraction has 46239 states and 179003 transitions. [2021-06-05 16:41:44,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 46239 states and 179003 transitions. [2021-06-05 16:41:44,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:44,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:44,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:45,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4140,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:45,109 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 78 times [2021-06-05 16:41:45,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:45,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601428630] [2021-06-05 16:41:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:45,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601428630] [2021-06-05 16:41:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601428630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628036946] [2021-06-05 16:41:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:45,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:41:45,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628036946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:45,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:45,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:41:45,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398191284] [2021-06-05 16:41:45,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:41:45,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:41:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:41:45,236 INFO L87 Difference]: Start difference. First operand 46239 states and 179003 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:46,066 INFO L93 Difference]: Finished difference Result 50471 states and 192992 transitions. [2021-06-05 16:41:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:41:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:46,196 INFO L225 Difference]: With dead ends: 50471 [2021-06-05 16:41:46,197 INFO L226 Difference]: Without dead ends: 50471 [2021-06-05 16:41:46,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:41:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50471 states. [2021-06-05 16:41:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50471 to 46343. [2021-06-05 16:41:47,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46343 states, 46342 states have (on average 3.869643088343188) internal successors, (179327), 46342 states have internal predecessors, (179327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46343 states to 46343 states and 179327 transitions. [2021-06-05 16:41:47,403 INFO L78 Accepts]: Start accepts. Automaton has 46343 states and 179327 transitions. Word has length 28 [2021-06-05 16:41:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:47,403 INFO L482 AbstractCegarLoop]: Abstraction has 46343 states and 179327 transitions. [2021-06-05 16:41:47,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:47,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46343 states and 179327 transitions. [2021-06-05 16:41:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:47,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:47,473 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:47,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-06-05 16:41:47,673 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 79 times [2021-06-05 16:41:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:47,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602604903] [2021-06-05 16:41:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:47,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:47,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602604903] [2021-06-05 16:41:47,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602604903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:47,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482478658] [2021-06-05 16:41:47,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:41:47,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482478658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:47,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:47,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 16:41:47,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630283381] [2021-06-05 16:41:47,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:41:47,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:47,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:41:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:41:47,776 INFO L87 Difference]: Start difference. First operand 46343 states and 179327 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:48,228 INFO L93 Difference]: Finished difference Result 50566 states and 193429 transitions. [2021-06-05 16:41:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:41:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:48,366 INFO L225 Difference]: With dead ends: 50566 [2021-06-05 16:41:48,366 INFO L226 Difference]: Without dead ends: 50554 [2021-06-05 16:41:48,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:41:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50554 states. [2021-06-05 16:41:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50554 to 46475. [2021-06-05 16:41:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46475 states, 46474 states have (on average 3.867861600034428) internal successors, (179755), 46474 states have internal predecessors, (179755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46475 states to 46475 states and 179755 transitions. [2021-06-05 16:41:49,728 INFO L78 Accepts]: Start accepts. Automaton has 46475 states and 179755 transitions. Word has length 28 [2021-06-05 16:41:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:49,729 INFO L482 AbstractCegarLoop]: Abstraction has 46475 states and 179755 transitions. [2021-06-05 16:41:49,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46475 states and 179755 transitions. [2021-06-05 16:41:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:50,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:50,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:50,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4142 [2021-06-05 16:41:50,309 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 80 times [2021-06-05 16:41:50,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:50,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658819463] [2021-06-05 16:41:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:50,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658819463] [2021-06-05 16:41:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658819463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733690244] [2021-06-05 16:41:50,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:50,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:41:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:41:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:50,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733690244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:50,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:50,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 16:41:50,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619376432] [2021-06-05 16:41:50,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:41:50,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:50,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:41:50,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:41:50,428 INFO L87 Difference]: Start difference. First operand 46475 states and 179755 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:50,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:50,917 INFO L93 Difference]: Finished difference Result 50530 states and 193345 transitions. [2021-06-05 16:41:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:41:50,918 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:51,048 INFO L225 Difference]: With dead ends: 50530 [2021-06-05 16:41:51,049 INFO L226 Difference]: Without dead ends: 50510 [2021-06-05 16:41:51,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:41:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50510 states. [2021-06-05 16:41:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50510 to 46475. [2021-06-05 16:41:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46475 states, 46474 states have (on average 3.867775530404097) internal successors, (179751), 46474 states have internal predecessors, (179751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46475 states to 46475 states and 179751 transitions. [2021-06-05 16:41:52,276 INFO L78 Accepts]: Start accepts. Automaton has 46475 states and 179751 transitions. Word has length 28 [2021-06-05 16:41:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:52,276 INFO L482 AbstractCegarLoop]: Abstraction has 46475 states and 179751 transitions. [2021-06-05 16:41:52,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46475 states and 179751 transitions. [2021-06-05 16:41:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:52,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:52,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:52,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 16:41:52,545 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:52,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:52,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1058352779, now seen corresponding path program 165 times [2021-06-05 16:41:52,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:52,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398675573] [2021-06-05 16:41:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:52,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:52,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398675573] [2021-06-05 16:41:52,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398675573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:52,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585117296] [2021-06-05 16:41:52,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:52,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:41:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:52,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585117296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:52,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:52,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:41:52,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772133703] [2021-06-05 16:41:52,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:52,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:52,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:52,667 INFO L87 Difference]: Start difference. First operand 46475 states and 179751 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:53,088 INFO L93 Difference]: Finished difference Result 51418 states and 197281 transitions. [2021-06-05 16:41:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:41:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:53,575 INFO L225 Difference]: With dead ends: 51418 [2021-06-05 16:41:53,575 INFO L226 Difference]: Without dead ends: 51415 [2021-06-05 16:41:53,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:41:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51415 states. [2021-06-05 16:41:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51415 to 48550. [2021-06-05 16:41:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48550 states, 48549 states have (on average 3.876434118107479) internal successors, (188197), 48549 states have internal predecessors, (188197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48550 states to 48550 states and 188197 transitions. [2021-06-05 16:41:55,189 INFO L78 Accepts]: Start accepts. Automaton has 48550 states and 188197 transitions. Word has length 28 [2021-06-05 16:41:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:55,189 INFO L482 AbstractCegarLoop]: Abstraction has 48550 states and 188197 transitions. [2021-06-05 16:41:55,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 48550 states and 188197 transitions. [2021-06-05 16:41:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:55,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:55,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:55,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4144,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:55,468 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:55,469 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 166 times [2021-06-05 16:41:55,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:55,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383006387] [2021-06-05 16:41:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:55,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383006387] [2021-06-05 16:41:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383006387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776820297] [2021-06-05 16:41:55,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:55,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:41:55,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:55,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776820297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:55,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:55,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:41:55,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150891486] [2021-06-05 16:41:55,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:55,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:55,613 INFO L87 Difference]: Start difference. First operand 48550 states and 188197 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:56,109 INFO L93 Difference]: Finished difference Result 54116 states and 206168 transitions. [2021-06-05 16:41:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:41:56,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:56,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:56,253 INFO L225 Difference]: With dead ends: 54116 [2021-06-05 16:41:56,253 INFO L226 Difference]: Without dead ends: 54116 [2021-06-05 16:41:56,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:41:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54116 states. [2021-06-05 16:41:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54116 to 43065. [2021-06-05 16:41:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43065 states, 43064 states have (on average 3.8637609139884823) internal successors, (166389), 43064 states have internal predecessors, (166389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43065 states to 43065 states and 166389 transitions. [2021-06-05 16:41:57,471 INFO L78 Accepts]: Start accepts. Automaton has 43065 states and 166389 transitions. Word has length 28 [2021-06-05 16:41:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:41:57,471 INFO L482 AbstractCegarLoop]: Abstraction has 43065 states and 166389 transitions. [2021-06-05 16:41:57,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43065 states and 166389 transitions. [2021-06-05 16:41:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:41:57,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:41:57,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:41:57,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4145 [2021-06-05 16:41:57,745 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:41:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:41:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash 811277253, now seen corresponding path program 167 times [2021-06-05 16:41:57,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:41:57,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666934969] [2021-06-05 16:41:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:41:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:41:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:57,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:41:57,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666934969] [2021-06-05 16:41:57,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666934969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:57,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542941344] [2021-06-05 16:41:57,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:41:57,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:41:57,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:41:57,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:41:57,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:41:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:41:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542941344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:41:57,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:41:57,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:41:57,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006400858] [2021-06-05 16:41:57,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:41:57,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:41:57,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:41:57,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:41:57,871 INFO L87 Difference]: Start difference. First operand 43065 states and 166389 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:41:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:41:58,738 INFO L93 Difference]: Finished difference Result 47945 states and 182818 transitions. [2021-06-05 16:41:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:41:58,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:41:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:41:58,846 INFO L225 Difference]: With dead ends: 47945 [2021-06-05 16:41:58,846 INFO L226 Difference]: Without dead ends: 47945 [2021-06-05 16:41:58,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:41:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47945 states. [2021-06-05 16:41:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47945 to 43898. [2021-06-05 16:41:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43898 states, 43897 states have (on average 3.8623823951522884) internal successors, (169547), 43897 states have internal predecessors, (169547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43898 states to 43898 states and 169547 transitions. [2021-06-05 16:42:00,056 INFO L78 Accepts]: Start accepts. Automaton has 43898 states and 169547 transitions. Word has length 28 [2021-06-05 16:42:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:00,056 INFO L482 AbstractCegarLoop]: Abstraction has 43898 states and 169547 transitions. [2021-06-05 16:42:00,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 43898 states and 169547 transitions. [2021-06-05 16:42:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:00,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:00,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:00,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4146,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:00,329 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 168 times [2021-06-05 16:42:00,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:00,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299855537] [2021-06-05 16:42:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:00,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:00,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299855537] [2021-06-05 16:42:00,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299855537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:00,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975078076] [2021-06-05 16:42:00,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:00,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:42:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:00,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:42:00,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:00,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975078076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:00,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:00,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 16:42:00,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211113199] [2021-06-05 16:42:00,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:42:00,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:00,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:42:00,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:42:00,457 INFO L87 Difference]: Start difference. First operand 43898 states and 169547 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:00,865 INFO L93 Difference]: Finished difference Result 45655 states and 175408 transitions. [2021-06-05 16:42:00,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:42:00,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:00,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:00,974 INFO L225 Difference]: With dead ends: 45655 [2021-06-05 16:42:00,974 INFO L226 Difference]: Without dead ends: 45655 [2021-06-05 16:42:00,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:42:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-06-05 16:42:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 43906. [2021-06-05 16:42:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43906 states, 43905 states have (on average 3.862225259082109) internal successors, (169571), 43905 states have internal predecessors, (169571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:02,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43906 states to 43906 states and 169571 transitions. [2021-06-05 16:42:02,065 INFO L78 Accepts]: Start accepts. Automaton has 43906 states and 169571 transitions. Word has length 28 [2021-06-05 16:42:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:02,065 INFO L482 AbstractCegarLoop]: Abstraction has 43906 states and 169571 transitions. [2021-06-05 16:42:02,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43906 states and 169571 transitions. [2021-06-05 16:42:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 16:42:02,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:02,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:02,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4147,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:02,331 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:02,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 169 times [2021-06-05 16:42:02,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:02,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478079195] [2021-06-05 16:42:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:02,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:02,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478079195] [2021-06-05 16:42:02,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478079195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:02,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653076098] [2021-06-05 16:42:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:42:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:02,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653076098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:02,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:02,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 16:42:02,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124642857] [2021-06-05 16:42:02,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:42:02,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:42:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:42:02,461 INFO L87 Difference]: Start difference. First operand 43906 states and 169571 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:02,910 INFO L93 Difference]: Finished difference Result 45371 states and 174477 transitions. [2021-06-05 16:42:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:42:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 16:42:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:03,019 INFO L225 Difference]: With dead ends: 45371 [2021-06-05 16:42:03,020 INFO L226 Difference]: Without dead ends: 45371 [2021-06-05 16:42:03,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:42:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45371 states. [2021-06-05 16:42:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45371 to 43796. [2021-06-05 16:42:04,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43796 states, 43795 states have (on average 3.8620390455531455) internal successors, (169138), 43795 states have internal predecessors, (169138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43796 states to 43796 states and 169138 transitions. [2021-06-05 16:42:04,199 INFO L78 Accepts]: Start accepts. Automaton has 43796 states and 169138 transitions. Word has length 28 [2021-06-05 16:42:04,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:04,199 INFO L482 AbstractCegarLoop]: Abstraction has 43796 states and 169138 transitions. [2021-06-05 16:42:04,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:04,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43796 states and 169138 transitions. [2021-06-05 16:42:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:42:04,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:04,267 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:04,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:04,467 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:04,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:04,468 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 170 times [2021-06-05 16:42:04,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:04,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923951568] [2021-06-05 16:42:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:04,770 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-06-05 16:42:05,111 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-05 16:42:05,381 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-06-05 16:42:05,652 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 16:42:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:05,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923951568] [2021-06-05 16:42:05,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923951568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:05,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657420314] [2021-06-05 16:42:05,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:05,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:42:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:05,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:42:05,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:06,266 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 16:42:06,472 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:42:06,788 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 16:42:07,012 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 16:42:07,196 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 16:42:07,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:07,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:07,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:07,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:07,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:42:07,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:07,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:07,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:07,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 16:42:07,592 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:07,915 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 110 [2021-06-05 16:42:07,916 INFO L628 ElimStorePlain]: treesize reduction 342, result has 42.2 percent of original size [2021-06-05 16:42:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:07,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:07,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:42:07,925 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:08,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:08,015 INFO L518 ElimStorePlain]: Eliminatee v_prenex_561 vanished before elimination [2021-06-05 16:42:08,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:42:08,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:08,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:42:08,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:08,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:42:08,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:08,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:08,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:42:08,276 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:08,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:08,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:42:08,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:08,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:08,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:42:08,404 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:668, output treesize:36 [2021-06-05 16:42:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:08,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657420314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:08,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:08,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:42:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917773576] [2021-06-05 16:42:08,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:42:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:08,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:42:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:42:08,447 INFO L87 Difference]: Start difference. First operand 43796 states and 169138 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:08,853 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-06-05 16:42:09,238 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 16:42:09,659 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 16:42:09,904 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 76 [2021-06-05 16:42:10,196 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2021-06-05 16:42:10,868 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 100 [2021-06-05 16:42:11,559 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 79 [2021-06-05 16:42:11,778 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 16:42:12,497 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2021-06-05 16:42:12,865 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-06-05 16:42:13,276 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 105 [2021-06-05 16:42:14,228 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 157 [2021-06-05 16:42:14,580 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 16:42:14,977 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-05 16:42:15,288 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-05 16:42:15,749 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-05 16:42:16,074 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-06-05 16:42:16,332 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-06-05 16:42:16,734 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-05 16:42:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:16,955 INFO L93 Difference]: Finished difference Result 53704 states and 203394 transitions. [2021-06-05 16:42:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:42:16,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:42:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:17,095 INFO L225 Difference]: With dead ends: 53704 [2021-06-05 16:42:17,095 INFO L226 Difference]: Without dead ends: 53629 [2021-06-05 16:42:17,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 9428.9ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:42:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53629 states. [2021-06-05 16:42:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53629 to 43931. [2021-06-05 16:42:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43931 states, 43930 states have (on average 3.8612110175278853) internal successors, (169623), 43930 states have internal predecessors, (169623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43931 states to 43931 states and 169623 transitions. [2021-06-05 16:42:18,150 INFO L78 Accepts]: Start accepts. Automaton has 43931 states and 169623 transitions. Word has length 30 [2021-06-05 16:42:18,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:18,150 INFO L482 AbstractCegarLoop]: Abstraction has 43931 states and 169623 transitions. [2021-06-05 16:42:18,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 43931 states and 169623 transitions. [2021-06-05 16:42:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:42:18,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:18,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:18,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4149,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:18,420 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:18,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 171 times [2021-06-05 16:42:18,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:18,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828575314] [2021-06-05 16:42:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:18,705 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-06-05 16:42:18,838 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 16:42:18,966 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-05 16:42:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:19,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:19,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828575314] [2021-06-05 16:42:19,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828575314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:19,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148078523] [2021-06-05 16:42:19,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:19,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:42:19,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:19,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:42:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:19,543 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 16:42:19,744 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 16:42:19,952 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 16:42:20,557 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 105 [2021-06-05 16:42:21,149 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 16:42:21,554 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-06-05 16:42:21,554 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:42:21,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:42:21,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:23,020 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 354 DAG size of output: 338 [2021-06-05 16:42:23,021 INFO L628 ElimStorePlain]: treesize reduction 310, result has 77.1 percent of original size [2021-06-05 16:42:23,086 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:42:23,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 43 [2021-06-05 16:42:23,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:23,672 WARN L205 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 341 [2021-06-05 16:42:23,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:23,749 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:42:23,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-05 16:42:23,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:24,991 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 338 DAG size of output: 333 [2021-06-05 16:42:24,992 INFO L628 ElimStorePlain]: treesize reduction 9, result has 99.1 percent of original size [2021-06-05 16:42:25,069 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:42:25,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-06-05 16:42:25,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:25,166 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:42:25,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 16:42:25,174 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:26,272 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 344 DAG size of output: 330 [2021-06-05 16:42:26,273 INFO L628 ElimStorePlain]: treesize reduction 77, result has 92.5 percent of original size [2021-06-05 16:42:26,350 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:42:26,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-06-05 16:42:26,353 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:26,396 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 16:42:26,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 16:42:26,397 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:26,902 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 332 [2021-06-05 16:42:26,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:26,981 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 16:42:26,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 16:42:26,991 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:27,067 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:42:27,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-05 16:42:27,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:28,007 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 325 [2021-06-05 16:42:28,007 INFO L628 ElimStorePlain]: treesize reduction 68, result has 92.5 percent of original size [2021-06-05 16:42:28,072 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 16:42:28,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-06-05 16:42:28,074 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:28,137 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:42:28,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 16:42:28,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:29,017 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 324 [2021-06-05 16:42:29,018 INFO L628 ElimStorePlain]: treesize reduction 45, result has 94.6 percent of original size [2021-06-05 16:42:29,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-05 16:42:29,110 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:29,523 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2021-06-05 16:42:29,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:29,589 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:42:29,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-06-05 16:42:29,595 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:29,997 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2021-06-05 16:42:29,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:30,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:30,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-06-05 16:42:30,060 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:30,437 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2021-06-05 16:42:30,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:30,497 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:42:30,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 16:42:30,501 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:30,870 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2021-06-05 16:42:30,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:30,933 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:42:30,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-06-05 16:42:30,938 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:31,308 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2021-06-05 16:42:31,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:31,365 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 16:42:31,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 16:42:31,370 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:31,754 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2021-06-05 16:42:31,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:31,822 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 16:42:31,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 16:42:31,834 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,545 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 279 [2021-06-05 16:42:32,545 INFO L628 ElimStorePlain]: treesize reduction 26, result has 96.2 percent of original size [2021-06-05 16:42:32,600 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:42:32,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 43 [2021-06-05 16:42:32,604 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:32,944 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2021-06-05 16:42:32,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:32,998 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 16:42:32,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 16:42:33,000 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:33,340 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 276 [2021-06-05 16:42:33,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:42:33,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 16 dim-1 vars, End of recursive call: and 19 xjuncts. [2021-06-05 16:42:33,413 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 48 variables, input treesize:1363, output treesize:907 [2021-06-05 16:42:33,711 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2021-06-05 16:42:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:33,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148078523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:33,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:33,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 16:42:33,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592203678] [2021-06-05 16:42:33,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:42:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:42:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:42:33,765 INFO L87 Difference]: Start difference. First operand 43931 states and 169623 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:34,201 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 49 [2021-06-05 16:42:34,496 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-05 16:42:34,975 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 16:42:35,270 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-05 16:42:35,475 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 61 [2021-06-05 16:42:35,672 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 50 [2021-06-05 16:42:35,944 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 16:42:36,159 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2021-06-05 16:42:36,465 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 61 [2021-06-05 16:42:37,295 WARN L205 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 123 [2021-06-05 16:42:37,831 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-05 16:42:38,024 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 53 [2021-06-05 16:42:38,239 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-05 16:42:39,047 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 109 [2021-06-05 16:42:40,017 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 148 [2021-06-05 16:42:40,160 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 44 [2021-06-05 16:42:41,004 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 134 [2021-06-05 16:42:41,486 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 16:42:41,941 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 16:42:42,274 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 16:42:42,484 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-05 16:42:42,961 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 107 [2021-06-05 16:42:44,588 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 186 DAG size of output: 173 [2021-06-05 16:42:45,123 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2021-06-05 16:42:45,396 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2021-06-05 16:42:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:45,584 INFO L93 Difference]: Finished difference Result 53564 states and 203065 transitions. [2021-06-05 16:42:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:42:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:42:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:45,730 INFO L225 Difference]: With dead ends: 53564 [2021-06-05 16:42:45,731 INFO L226 Difference]: Without dead ends: 53534 [2021-06-05 16:42:45,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 12706.3ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:42:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53534 states. [2021-06-05 16:42:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53534 to 43946. [2021-06-05 16:42:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43946 states, 43945 states have (on average 3.8610080782796676) internal successors, (169672), 43945 states have internal predecessors, (169672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43946 states to 43946 states and 169672 transitions. [2021-06-05 16:42:46,756 INFO L78 Accepts]: Start accepts. Automaton has 43946 states and 169672 transitions. Word has length 30 [2021-06-05 16:42:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:46,756 INFO L482 AbstractCegarLoop]: Abstraction has 43946 states and 169672 transitions. [2021-06-05 16:42:46,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand 43946 states and 169672 transitions. [2021-06-05 16:42:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:42:46,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:46,824 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:42:47,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4190 [2021-06-05 16:42:47,024 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:42:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:42:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 172 times [2021-06-05 16:42:47,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:42:47,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97905647] [2021-06-05 16:42:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:42:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:42:47,662 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-05 16:42:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:47,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:42:47,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97905647] [2021-06-05 16:42:47,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97905647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:47,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742432567] [2021-06-05 16:42:47,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:42:47,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:42:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:42:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:42:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:42:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 16:42:49,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:49,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:49,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:49,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:42:49,386 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:49,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:42:49,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-05 16:42:49,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:42:49,437 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:49,449 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 19 [2021-06-05 16:42:49,462 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-05 16:42:49,475 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:49,487 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-06-05 16:42:49,500 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:49,513 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-06-05 16:42:49,525 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:49,538 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:42:49,551 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 16:42:49,565 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:42:49,579 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:42:49,592 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:49,605 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 16 [2021-06-05 16:42:49,619 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:42:49,633 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:42:49,647 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:42:49,661 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:42:49,673 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 16:42:49,687 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:49,701 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 16:42:49,714 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-05 16:42:49,728 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-06-05 16:42:49,741 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2021-06-05 16:42:49,754 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-05 16:42:49,769 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:49,781 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 16:42:49,795 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-05 16:42:49,808 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,940 INFO L244 Elim1Store]: Index analysis took 127 ms [2021-06-05 16:42:49,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-06-05 16:42:49,941 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 16:42:49,954 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 16 [2021-06-05 16:42:49,967 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 16:42:49,979 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:42:49,992 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:49,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:50,004 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:42:50,017 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:50,029 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:50,041 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-06-05 16:42:50,053 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:42:50,065 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 16:42:50,078 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2021-06-05 16:42:50,090 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:50,102 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:42:50,114 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:42:50,125 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:42:50,136 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:42:50,147 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:42:50,159 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:42:50,170 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:42:50,181 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-05 16:42:50,193 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-05 16:42:50,203 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:42:50,214 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 16:42:50,224 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:42:50,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:42:50,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:42:50,230 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 16:42:50,253 INFO L628 ElimStorePlain]: treesize reduction 52, result has 28.8 percent of original size [2021-06-05 16:42:50,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:42:50,255 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3328, output treesize:15 [2021-06-05 16:42:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:42:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742432567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:42:50,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:42:50,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:42:50,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899554720] [2021-06-05 16:42:50,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:42:50,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:42:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:42:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:42:50,288 INFO L87 Difference]: Start difference. First operand 43946 states and 169672 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:50,886 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2021-06-05 16:42:51,122 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 64 [2021-06-05 16:42:51,506 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 67 [2021-06-05 16:42:51,991 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 70 [2021-06-05 16:42:52,347 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 88 [2021-06-05 16:42:52,677 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 79 [2021-06-05 16:42:53,083 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2021-06-05 16:42:53,531 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 68 [2021-06-05 16:42:53,910 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2021-06-05 16:42:54,059 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2021-06-05 16:42:54,403 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 77 [2021-06-05 16:42:54,758 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 82 [2021-06-05 16:42:54,897 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-06-05 16:42:55,189 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 71 [2021-06-05 16:42:55,467 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2021-06-05 16:42:55,784 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-06-05 16:42:56,095 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-05 16:42:56,267 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:42:56,448 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2021-06-05 16:42:56,940 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2021-06-05 16:42:57,117 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:42:57,440 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 77 [2021-06-05 16:42:57,792 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-06-05 16:42:57,986 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-06-05 16:42:58,171 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-05 16:42:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:42:58,700 INFO L93 Difference]: Finished difference Result 55841 states and 209381 transitions. [2021-06-05 16:42:58,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:42:58,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:42:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:42:58,845 INFO L225 Difference]: With dead ends: 55841 [2021-06-05 16:42:58,845 INFO L226 Difference]: Without dead ends: 55811 [2021-06-05 16:42:58,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 8555.6ms TimeCoverageRelationStatistics Valid=553, Invalid=3229, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 16:42:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55811 states. [2021-06-05 16:42:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55811 to 43990. [2021-06-05 16:42:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43990 states, 43989 states have (on average 3.860851576530496) internal successors, (169835), 43989 states have internal predecessors, (169835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43990 states to 43990 states and 169835 transitions. [2021-06-05 16:42:59,866 INFO L78 Accepts]: Start accepts. Automaton has 43990 states and 169835 transitions. Word has length 30 [2021-06-05 16:42:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:42:59,866 INFO L482 AbstractCegarLoop]: Abstraction has 43990 states and 169835 transitions. [2021-06-05 16:42:59,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:42:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 43990 states and 169835 transitions. [2021-06-05 16:42:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:42:59,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:42:59,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:00,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-06-05 16:43:00,137 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:00,137 INFO L82 PathProgramCache]: Analyzing trace with hash 924713707, now seen corresponding path program 173 times [2021-06-05 16:43:00,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:00,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353560472] [2021-06-05 16:43:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:00,622 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 16:43:00,781 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2021-06-05 16:43:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353560472] [2021-06-05 16:43:00,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353560472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225040397] [2021-06-05 16:43:00,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:00,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:43:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:43:00,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:01,157 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 16:43:01,357 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 16:43:01,567 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 16:43:01,867 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 16:43:02,298 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2021-06-05 16:43:02,831 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-05 16:43:03,294 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 170 [2021-06-05 16:43:03,771 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 16:43:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:04,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:04,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 16:43:04,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 16:43:04,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:43:04,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 16:43:04,176 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 16:43:04,192 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 16 [2021-06-05 16:43:04,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,465 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 108 [2021-06-05 16:43:04,465 INFO L628 ElimStorePlain]: treesize reduction 256, result has 50.7 percent of original size [2021-06-05 16:43:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:43:04,478 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 16:43:04,489 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:04,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:43:04,501 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:43:04,509 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:04,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:04,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 34 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:43:04,589 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 36 variables, input treesize:845, output treesize:36 [2021-06-05 16:43:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:04,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225040397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:04,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:04,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 16:43:04,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982298587] [2021-06-05 16:43:04,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:43:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:04,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:43:04,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:43:04,648 INFO L87 Difference]: Start difference. First operand 43990 states and 169835 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:05,538 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-06-05 16:43:05,822 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 73 [2021-06-05 16:43:06,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-05 16:43:07,376 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 102 [2021-06-05 16:43:08,090 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 85 [2021-06-05 16:43:08,445 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 84 [2021-06-05 16:43:08,718 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:43:09,765 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 100 [2021-06-05 16:43:10,600 WARN L205 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 128 [2021-06-05 16:43:10,807 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2021-06-05 16:43:11,114 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 77 [2021-06-05 16:43:11,246 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2021-06-05 16:43:11,398 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 16:43:12,808 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 149 DAG size of output: 115 [2021-06-05 16:43:12,988 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 16:43:13,852 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 105 [2021-06-05 16:43:14,297 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 87 [2021-06-05 16:43:14,615 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2021-06-05 16:43:15,588 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 114 [2021-06-05 16:43:16,955 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 221 DAG size of output: 143 [2021-06-05 16:43:17,277 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 16:43:18,358 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 132 DAG size of output: 103 [2021-06-05 16:43:19,258 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 131 [2021-06-05 16:43:19,820 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-06-05 16:43:20,216 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2021-06-05 16:43:20,453 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 16:43:21,517 WARN L205 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 117 [2021-06-05 16:43:22,115 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 125 [2021-06-05 16:43:22,400 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2021-06-05 16:43:22,815 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 118 [2021-06-05 16:43:23,891 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-06-05 16:43:24,564 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 126 [2021-06-05 16:43:25,336 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 123 [2021-06-05 16:43:25,952 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 195 [2021-06-05 16:43:26,684 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 195 [2021-06-05 16:43:27,364 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 188 [2021-06-05 16:43:27,911 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 192 [2021-06-05 16:43:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:28,226 INFO L93 Difference]: Finished difference Result 69300 states and 257529 transitions. [2021-06-05 16:43:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 16:43:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:43:28,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:28,406 INFO L225 Difference]: With dead ends: 69300 [2021-06-05 16:43:28,406 INFO L226 Difference]: Without dead ends: 69270 [2021-06-05 16:43:28,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 23686.7ms TimeCoverageRelationStatistics Valid=668, Invalid=5184, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 16:43:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-06-05 16:43:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 44041. [2021-06-05 16:43:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44041 states, 44040 states have (on average 3.86030881017257) internal successors, (170008), 44040 states have internal predecessors, (170008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44041 states to 44041 states and 170008 transitions. [2021-06-05 16:43:29,573 INFO L78 Accepts]: Start accepts. Automaton has 44041 states and 170008 transitions. Word has length 30 [2021-06-05 16:43:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:29,574 INFO L482 AbstractCegarLoop]: Abstraction has 44041 states and 170008 transitions. [2021-06-05 16:43:29,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 44041 states and 170008 transitions. [2021-06-05 16:43:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:43:29,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:29,641 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:29,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4605,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:29,842 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:29,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 174 times [2021-06-05 16:43:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:29,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756366660] [2021-06-05 16:43:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:30,086 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2021-06-05 16:43:30,297 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-06-05 16:43:30,502 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 16:43:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:30,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756366660] [2021-06-05 16:43:30,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756366660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:30,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767863338] [2021-06-05 16:43:30,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:30,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:43:30,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:43:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:43:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:30,997 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 16:43:31,338 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 16:43:31,788 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 16:43:32,951 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 186 DAG size of output: 138 [2021-06-05 16:43:33,627 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 99 [2021-06-05 16:43:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:33,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:33,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:33,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:33,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:33,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,218 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 114 [2021-06-05 16:43:34,219 INFO L628 ElimStorePlain]: treesize reduction 134, result has 68.8 percent of original size [2021-06-05 16:43:34,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:43:34,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,354 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 16:43:34,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:43:34,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,480 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 16:43:34,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:34,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:43:34,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,597 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 16:43:34,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 16:43:34,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:34,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:34,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:34,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:34,712 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 16:43:34,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:34,849 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 16:43:34,849 INFO L628 ElimStorePlain]: treesize reduction 16, result has 89.9 percent of original size [2021-06-05 16:43:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 16:43:34,856 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:35,032 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 16:43:35,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:43:35,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:43:35,036 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 21 variables, input treesize:502, output treesize:39 [2021-06-05 16:43:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:35,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767863338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:35,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:35,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 16:43:35,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900269501] [2021-06-05 16:43:35,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:43:35,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:43:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:43:35,084 INFO L87 Difference]: Start difference. First operand 44041 states and 170008 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:35,271 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2021-06-05 16:43:35,557 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2021-06-05 16:43:35,933 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-05 16:43:36,241 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 16:43:36,420 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 16:43:36,609 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 60 [2021-06-05 16:43:36,868 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 58 [2021-06-05 16:43:37,044 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2021-06-05 16:43:37,757 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-05 16:43:38,486 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2021-06-05 16:43:38,671 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-05 16:43:39,774 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 156 DAG size of output: 128 [2021-06-05 16:43:40,837 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 160 DAG size of output: 129 [2021-06-05 16:43:40,991 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 16:43:41,646 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2021-06-05 16:43:42,873 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 164 DAG size of output: 127 [2021-06-05 16:43:44,010 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 160 DAG size of output: 126 [2021-06-05 16:43:44,301 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-05 16:43:44,455 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-05 16:43:44,787 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 16:43:45,561 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 111 [2021-06-05 16:43:45,759 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-05 16:43:46,169 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 16:43:46,409 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 16:43:47,291 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 126 [2021-06-05 16:43:47,542 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-05 16:43:47,771 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-06-05 16:43:47,993 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2021-06-05 16:43:48,185 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-06-05 16:43:48,456 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 34 [2021-06-05 16:43:48,643 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-05 16:43:48,848 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-06-05 16:43:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:43:49,044 INFO L93 Difference]: Finished difference Result 57596 states and 215241 transitions. [2021-06-05 16:43:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:43:49,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:43:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:43:49,210 INFO L225 Difference]: With dead ends: 57596 [2021-06-05 16:43:49,210 INFO L226 Difference]: Without dead ends: 57461 [2021-06-05 16:43:49,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 15517.3ms TimeCoverageRelationStatistics Valid=682, Invalid=2858, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:43:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57461 states. [2021-06-05 16:43:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57461 to 44285. [2021-06-05 16:43:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44285 states, 44284 states have (on average 3.85920422726041) internal successors, (170901), 44284 states have internal predecessors, (170901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44285 states to 44285 states and 170901 transitions. [2021-06-05 16:43:50,296 INFO L78 Accepts]: Start accepts. Automaton has 44285 states and 170901 transitions. Word has length 30 [2021-06-05 16:43:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:43:50,296 INFO L482 AbstractCegarLoop]: Abstraction has 44285 states and 170901 transitions. [2021-06-05 16:43:50,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 44285 states and 170901 transitions. [2021-06-05 16:43:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:43:50,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:43:50,366 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:43:50,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4629 [2021-06-05 16:43:50,566 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:43:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:43:50,567 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 175 times [2021-06-05 16:43:50,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:43:50,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482763613] [2021-06-05 16:43:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:43:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:51,077 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 16:43:51,274 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:51,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:43:51,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482763613] [2021-06-05 16:43:51,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482763613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:51,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115277270] [2021-06-05 16:43:51,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:43:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:43:51,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 16:43:51,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:43:52,225 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 16:43:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:53,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:43:53,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:43:53,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 22 [2021-06-05 16:43:53,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 22 [2021-06-05 16:43:53,123 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:53,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:53,154 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:53,170 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 22 [2021-06-05 16:43:53,186 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-06-05 16:43:53,203 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-06-05 16:43:53,219 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:43:53,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:53,253 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:43:53,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:53,286 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:53,305 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:43:53,328 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 16:43:53,350 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-05 16:43:53,373 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:53,396 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-05 16:43:53,418 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:43:53,441 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:53,462 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 22 [2021-06-05 16:43:53,483 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 19 [2021-06-05 16:43:53,505 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:53,527 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-05 16:43:53,549 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 19 [2021-06-05 16:43:53,570 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-05 16:43:53,593 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:53,616 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:53,638 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:43:53,657 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-05 16:43:53,675 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:53,692 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 16:43:53,708 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 22 [2021-06-05 16:43:53,724 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:53,742 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:53,878 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 25 [2021-06-05 16:43:53,892 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 16:43:53,906 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:43:53,926 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:53,945 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:53,964 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 16:43:53,984 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:53,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:53,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:53,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:54,002 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 22 [2021-06-05 16:43:54,016 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-06-05 16:43:54,029 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:54,043 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:54,056 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 22 [2021-06-05 16:43:54,070 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:43:54,083 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-05 16:43:54,099 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 16:43:54,112 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2021-06-05 16:43:54,126 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:43:54,138 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 16:43:54,151 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:43:54,163 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 16 [2021-06-05 16:43:54,175 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:43:54,187 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 22 [2021-06-05 16:43:54,199 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-06-05 16:43:54,209 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:54,220 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:43:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:43:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:43:54,226 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 16:43:54,257 INFO L628 ElimStorePlain]: treesize reduction 116, result has 15.3 percent of original size [2021-06-05 16:43:54,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 16:43:54,258 INFO L247 ElimStorePlain]: Needed 64 recursive calls to eliminate 2 variables, input treesize:3424, output treesize:15 [2021-06-05 16:43:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:43:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115277270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:43:54,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:43:54,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:43:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254648754] [2021-06-05 16:43:54,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:43:54,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:43:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:43:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:43:54,289 INFO L87 Difference]: Start difference. First operand 44285 states and 170901 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:43:55,256 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 78 [2021-06-05 16:43:55,630 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2021-06-05 16:43:56,040 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2021-06-05 16:43:56,598 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 77 [2021-06-05 16:43:56,872 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 88 [2021-06-05 16:43:57,231 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2021-06-05 16:43:57,805 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2021-06-05 16:43:58,182 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 84 [2021-06-05 16:43:58,374 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 16:43:58,676 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 77 [2021-06-05 16:43:58,897 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 80 [2021-06-05 16:43:59,162 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 85 [2021-06-05 16:43:59,417 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-05 16:43:59,849 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-06-05 16:44:00,317 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2021-06-05 16:44:00,612 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 84 [2021-06-05 16:44:01,435 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-05 16:44:01,611 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 16:44:02,181 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 16:44:02,384 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 16:44:02,507 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 16:44:02,730 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 16:44:03,024 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 16:44:03,270 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 16:44:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:44:03,638 INFO L93 Difference]: Finished difference Result 63426 states and 236013 transitions. [2021-06-05 16:44:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 16:44:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 16:44:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:44:03,806 INFO L225 Difference]: With dead ends: 63426 [2021-06-05 16:44:03,806 INFO L226 Difference]: Without dead ends: 63396 [2021-06-05 16:44:03,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 8920.2ms TimeCoverageRelationStatistics Valid=936, Invalid=5870, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 16:44:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63396 states. [2021-06-05 16:44:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63396 to 44329. [2021-06-05 16:44:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44329 states, 44328 states have (on average 3.859389099440534) internal successors, (171079), 44328 states have internal predecessors, (171079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44329 states to 44329 states and 171079 transitions. [2021-06-05 16:44:04,955 INFO L78 Accepts]: Start accepts. Automaton has 44329 states and 171079 transitions. Word has length 30 [2021-06-05 16:44:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:44:04,955 INFO L482 AbstractCegarLoop]: Abstraction has 44329 states and 171079 transitions. [2021-06-05 16:44:04,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 44329 states and 171079 transitions. [2021-06-05 16:44:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:44:05,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:44:05,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:44:05,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4658,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:05,228 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:44:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:44:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 176 times [2021-06-05 16:44:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:44:05,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023612219] [2021-06-05 16:44:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:44:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:44:05,568 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 16:44:05,685 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 16:44:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:05,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:44:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023612219] [2021-06-05 16:44:05,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023612219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:05,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422220679] [2021-06-05 16:44:05,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:44:05,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:44:05,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:44:05,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 16:44:05,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:44:06,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,459 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:44:06,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-06-05 16:44:06,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,486 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:06,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,528 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 16:44:06,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 39 [2021-06-05 16:44:06,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,559 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:06,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,587 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:06,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,628 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:44:06,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2021-06-05 16:44:06,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,661 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:44:06,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,697 INFO L354 Elim1Store]: treesize reduction 23, result has 14.8 percent of original size [2021-06-05 16:44:06,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 29 [2021-06-05 16:44:06,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,736 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:44:06,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 28 [2021-06-05 16:44:06,737 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,762 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:06,763 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,801 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-05 16:44:06,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 16:44:06,803 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,843 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 16:44:06,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 16:44:06,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,876 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:44:06,877 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,905 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:06,906 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,937 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:06,938 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,966 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 16:44:06,967 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:06,995 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:06,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:06,996 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,025 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:44:07,026 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,054 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:07,055 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,084 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:44:07,085 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,111 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:44:07,112 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,140 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:44:07,141 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,169 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:07,170 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,199 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:07,200 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,226 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:44:07,227 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,255 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:07,257 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:44:07,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 42 [2021-06-05 16:44:07,304 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,332 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:07,333 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,371 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 16:44:07,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 30 [2021-06-05 16:44:07,373 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,402 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 16:44:07,403 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,432 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:44:07,433 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,459 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:44:07,460 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,489 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:44:07,489 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,526 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 16:44:07,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-06-05 16:44:07,528 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,559 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:44:07,560 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,588 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 16:44:07,590 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,618 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:44:07,619 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,649 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:07,650 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,677 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 16:44:07,678 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,705 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:07,706 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,732 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:44:07,905 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,929 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:44:07,930 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,950 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:44:07,951 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,975 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:07,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:07,976 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,003 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:08,004 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,031 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:08,032 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,055 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:44:08,055 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,078 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 16:44:08,080 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,104 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 1 [2021-06-05 16:44:08,105 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,129 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 16:44:08,130 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,154 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:44:08,155 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,179 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:44:08,180 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,209 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 16:44:08,210 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,235 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:08,236 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,261 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:08,261 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,283 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 16:44:08,284 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,308 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:08,309 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,334 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 1 [2021-06-05 16:44:08,334 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,356 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 16:44:08,357 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,381 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 1 [2021-06-05 16:44:08,382 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,404 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 16:44:08,405 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,426 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 16:44:08,426 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,447 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 16:44:08,448 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:44:08,459 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 16:44:08,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 1 [2021-06-05 16:44:08,460 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 16:44:08,548 INFO L628 ElimStorePlain]: treesize reduction 136, result has 37.3 percent of original size [2021-06-05 16:44:08,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 16:44:08,549 INFO L247 ElimStorePlain]: Needed 65 recursive calls to eliminate 1 variables, input treesize:3409, output treesize:81 [2021-06-05 16:44:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:44:08,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422220679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:44:08,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:44:08,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:44:08,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304106194] [2021-06-05 16:44:08,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:44:08,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:44:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:44:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:44:08,657 INFO L87 Difference]: Start difference. First operand 44329 states and 171079 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:44:09,996 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-05 16:44:10,501 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-05 16:44:11,061 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2021-06-05 16:44:11,773 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:44:12,025 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-06-05 16:44:12,472 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 16:44:12,667 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 16:44:12,877 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2021-06-05 16:44:13,237 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 16:44:13,553 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-05 16:44:13,882 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 16:44:14,604 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2021-06-05 16:44:15,018 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2021-06-05 16:44:15,376 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 16:44:15,640 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-05 16:44:15,981 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-05 16:44:16,196 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 16:44:16,477 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2021-06-05 16:44:16,736 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 16:44:16,970 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-05 16:44:17,550 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-06-05 16:44:17,830 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-05 16:44:18,278 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 99 [2021-06-05 16:44:18,624 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 87 [2021-06-05 16:44:18,850 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 16:44:19,224 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 90 [2021-06-05 16:44:19,546 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 97 [2021-06-05 16:44:19,710 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 16:44:19,892 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-05 16:44:20,136 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2021-06-05 16:44:20,513 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2021-06-05 16:44:20,925 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-06-05 16:44:21,242 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-05 16:44:21,716 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2021-06-05 16:44:22,238 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 107 [2021-06-05 16:44:22,429 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 16:44:22,707 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-05 16:44:22,933 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 16:44:23,298 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2021-06-05 16:44:23,810 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2021-06-05 16:44:24,065 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 16:44:24,440 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2021-06-05 16:44:24,722 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-06-05 16:44:24,937 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 16:44:25,321 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2021-06-05 16:44:26,004 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 113 [2021-06-05 16:44:26,344 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-06-05 16:44:26,829 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 123 [2021-06-05 16:44:27,002 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-06-05 16:44:27,599 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2021-06-05 16:44:28,020 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 16:44:28,269 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 16:44:28,812 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 136 [2021-06-05 16:44:28,999 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 16:44:29,465 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 136 [2021-06-05 16:44:29,870 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 105 [2021-06-05 16:44:30,198 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 106 [2021-06-05 16:44:30,646 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 125 Received shutdown request... [2021-06-05 16:44:31,493 WARN L222 SmtUtils]: Removed 11 from assertion stack [2021-06-05 16:44:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-05 16:44:31,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-06-05 16:44:31,694 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:44:31,695 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:44:31,697 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:44:31,697 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:44:31 BasicIcfg [2021-06-05 16:44:31,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:44:31,698 INFO L168 Benchmark]: Toolchain (without parser) took 763967.04 ms. Allocated memory was 379.6 MB in the beginning and 15.8 GB in the end (delta: 15.4 GB). Free memory was 359.4 MB in the beginning and 12.8 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 16:44:31,698 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 379.6 MB. Free memory was 360.5 MB in the beginning and 360.5 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:44:31,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.87 ms. Allocated memory is still 379.6 MB. Free memory was 359.3 MB in the beginning and 357.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:44:31,698 INFO L168 Benchmark]: Boogie Preprocessor took 15.52 ms. Allocated memory is still 379.6 MB. Free memory was 357.8 MB in the beginning and 356.8 MB in the end (delta: 981.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 16:44:31,698 INFO L168 Benchmark]: RCFGBuilder took 240.21 ms. Allocated memory is still 379.6 MB. Free memory was 356.8 MB in the beginning and 344.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 16:44:31,698 INFO L168 Benchmark]: TraceAbstraction took 763682.46 ms. Allocated memory was 379.6 MB in the beginning and 15.8 GB in the end (delta: 15.4 GB). Free memory was 343.7 MB in the beginning and 12.8 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 16:44:31,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 379.6 MB. Free memory was 360.5 MB in the beginning and 360.5 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.87 ms. Allocated memory is still 379.6 MB. Free memory was 359.3 MB in the beginning and 357.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.52 ms. Allocated memory is still 379.6 MB. Free memory was 357.8 MB in the beginning and 356.8 MB in the end (delta: 981.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 240.21 ms. Allocated memory is still 379.6 MB. Free memory was 356.8 MB in the beginning and 344.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 763682.46 ms. Allocated memory was 379.6 MB in the beginning and 15.8 GB in the end (delta: 15.4 GB). Free memory was 343.7 MB in the beginning and 12.8 GB in the end (delta: -12.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 114 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 142 for 431ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 114 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 142 for 431ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 114 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 142 for 431ms.. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (44329states) and FLOYD_HOARE automaton (currently 114 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 142 for 431ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 763584.5ms, OverallIterations: 259, TraceHistogramMax: 3, EmptinessCheckTime: 5120.0ms, AutomataDifference: 421321.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11905 SDtfs, 75579 SDslu, 92447 SDs, 0 SdLazy, 149950 SolverSat, 13740 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 82664.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17039 GetRequests, 5447 SyntacticMatches, 250 SemanticMatches, 11341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200214 ImplicationChecksByTransitivity, 357894.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48550occurred in iteration=248, InterpolantAutomatonStates: 9994, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 87670.5ms AutomataMinimizationTime, 258 MinimizatonAttempts, 1353566 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 783.3ms SsaConstructionTime, 2652.9ms SatisfiabilityAnalysisTime, 188431.5ms InterpolantComputationTime, 13778 NumberOfCodeBlocks, 13778 NumberOfCodeBlocksAsserted, 894 NumberOfCheckSat, 13263 ConstructedInterpolants, 193 QuantifiedInterpolants, 218508 SizeOfPredicates, 1049 NumberOfNonLiveVariables, 17406 ConjunctsInSsa, 3745 ConjunctsInUnsatCore, 515 InterpolantComputations, 3 PerfectInterpolantSequences, 1001/4406 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown