/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:20:14,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:20:14,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:20:14,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-09 18:20:14,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-09 18:20:14,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-09 18:20:14,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-09 18:20:14,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-09 18:20:14,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-09 18:20:14,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-09 18:20:14,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-09 18:20:14,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-09 18:20:14,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:20:14,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:20:14,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:20:14,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:20:14,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:20:14,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:20:14,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:20:14,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:20:14,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:20:14,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:20:14,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:20:14,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:20:14,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-09 18:20:14,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-09 18:20:14,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-09 18:20:14,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-09 18:20:14,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-09 18:20:14,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-09 18:20:14,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:20:14,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:20:14,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:20:14,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:20:14,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:20:14,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:20:14,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:20:14,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:20:14,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:20:14,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:20:14,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:20:14,365 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.epf [2021-07-09 18:20:14,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:20:14,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:20:14,411 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:20:14,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:20:14,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:20:14,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:20:14,414 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:20:14,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:20:14,414 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:20:14,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:20:14,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:20:14,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:20:14,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:20:14,416 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:20:14,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:20:14,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:20:14,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:20:14,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:20:14,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:20:14,700 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:20:14,701 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:20:14,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2021-07-09 18:20:14,701 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2021-07-09 18:20:14,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:20:14,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:20:14,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:20:14,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:20:14,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:20:14,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:20:14,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:20:14,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:20:14,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:20:14,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/1) ... [2021-07-09 18:20:14,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:20:14,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:20:14,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:20:14,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:20:14,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (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 [2021-07-09 18:20:14,822 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:20:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:20:14,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:20:14,823 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:20:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:20:14,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:20:14,824 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:20:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:20:14,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:20:14,824 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:20:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:20:14,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:20:14,826 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:20:14,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:20:14,997 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:20:14,998 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:20:14 BoogieIcfgContainer [2021-07-09 18:20:14,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:20:15,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:20:15,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:20:15,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:20:15,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:20:14" (1/2) ... [2021-07-09 18:20:15,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7002ca59 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:20:15, skipping insertion in model container [2021-07-09 18:20:15,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:20:14" (2/2) ... [2021-07-09 18:20:15,003 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2021-07-09 18:20:15,007 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:20:15,007 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:20:15,007 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:20:15,007 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:20:15,073 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:20:15,088 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:20:15,121 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:20:15,121 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:20:15,121 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:20:15,121 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:20:15,122 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:20:15,122 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:20:15,122 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:20:15,122 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:20:15,128 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-07-09 18:20:15,168 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:20:15,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:15,181 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:15,181 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2112338189, now seen corresponding path program 1 times [2021-07-09 18:20:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:15,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365934178] [2021-07-09 18:20:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:15,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:15,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365934178] [2021-07-09 18:20:15,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365934178] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:15,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:15,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:20:15,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354614722] [2021-07-09 18:20:15,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:20:15,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:20:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:20:15,347 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 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) [2021-07-09 18:20:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:15,387 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-07-09 18:20:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:20:15,389 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 [2021-07-09 18:20:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:15,403 INFO L225 Difference]: With dead ends: 298 [2021-07-09 18:20:15,403 INFO L226 Difference]: Without dead ends: 283 [2021-07-09 18:20:15,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:20:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-07-09 18:20:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-07-09 18:20:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:15,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-07-09 18:20:15,461 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-07-09 18:20:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:15,462 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-07-09 18:20:15,462 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) [2021-07-09 18:20:15,462 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-07-09 18:20:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:15,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:15,467 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:15,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:20:15,468 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:15,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1377866598, now seen corresponding path program 1 times [2021-07-09 18:20:15,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:15,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925726172] [2021-07-09 18:20:15,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:15,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:15,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925726172] [2021-07-09 18:20:15,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925726172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:15,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472537735] [2021-07-09 18:20:15,579 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 [2021-07-09 18:20:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:15,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:20:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:15,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472537735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:15,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:15,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:20:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453397607] [2021-07-09 18:20:15,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:15,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:15,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:15,814 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-07-09 18:20:16,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:16,261 INFO L93 Difference]: Finished difference Result 1019 states and 2933 transitions. [2021-07-09 18:20:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:20:16,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 21 [2021-07-09 18:20:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:16,271 INFO L225 Difference]: With dead ends: 1019 [2021-07-09 18:20:16,271 INFO L226 Difference]: Without dead ends: 1019 [2021-07-09 18:20:16,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-07-09 18:20:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 253. [2021-07-09 18:20:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2021-07-09 18:20:16,308 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2021-07-09 18:20:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:16,309 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2021-07-09 18:20:16,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-07-09 18:20:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2021-07-09 18:20:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:16,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:16,311 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:16,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:20:16,525 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1571767266, now seen corresponding path program 2 times [2021-07-09 18:20:16,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:16,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677052257] [2021-07-09 18:20:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:16,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:16,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677052257] [2021-07-09 18:20:16,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677052257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:16,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428768320] [2021-07-09 18:20:16,578 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 [2021-07-09 18:20:16,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:16,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:16,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:20:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:16,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428768320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:16,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:16,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:20:16,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062302136] [2021-07-09 18:20:16,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:16,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:16,766 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-07-09 18:20:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,081 INFO L93 Difference]: Finished difference Result 1035 states and 2973 transitions. [2021-07-09 18:20:17,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:20:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 21 [2021-07-09 18:20:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,087 INFO L225 Difference]: With dead ends: 1035 [2021-07-09 18:20:17,087 INFO L226 Difference]: Without dead ends: 1035 [2021-07-09 18:20:17,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-07-09 18:20:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 252. [2021-07-09 18:20:17,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2021-07-09 18:20:17,099 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2021-07-09 18:20:17,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,100 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2021-07-09 18:20:17,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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) [2021-07-09 18:20:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2021-07-09 18:20:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:17,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,101 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:17,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:17,319 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash -120635141, now seen corresponding path program 1 times [2021-07-09 18:20:17,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:17,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599984113] [2021-07-09 18:20:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:17,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599984113] [2021-07-09 18:20:17,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599984113] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:17,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:17,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:20:17,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224029180] [2021-07-09 18:20:17,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:20:17,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:20:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:20:17,355 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,420 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2021-07-09 18:20:17,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:20:17,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,424 INFO L225 Difference]: With dead ends: 483 [2021-07-09 18:20:17,424 INFO L226 Difference]: Without dead ends: 477 [2021-07-09 18:20:17,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:20:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-07-09 18:20:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2021-07-09 18:20:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2021-07-09 18:20:17,434 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2021-07-09 18:20:17,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,434 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2021-07-09 18:20:17,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2021-07-09 18:20:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:17,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,436 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:17,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:20:17,436 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1682109104, now seen corresponding path program 1 times [2021-07-09 18:20:17,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:17,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839794488] [2021-07-09 18:20:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:17,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839794488] [2021-07-09 18:20:17,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839794488] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:17,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:17,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:20:17,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541284487] [2021-07-09 18:20:17,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:20:17,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:17,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:20:17,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:20:17,471 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,538 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2021-07-09 18:20:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:20:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,541 INFO L225 Difference]: With dead ends: 539 [2021-07-09 18:20:17,541 INFO L226 Difference]: Without dead ends: 521 [2021-07-09 18:20:17,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-09 18:20:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2021-07-09 18:20:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2021-07-09 18:20:17,549 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2021-07-09 18:20:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,550 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2021-07-09 18:20:17,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2021-07-09 18:20:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:17,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,551 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:17,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:20:17,551 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:17,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1479238087, now seen corresponding path program 2 times [2021-07-09 18:20:17,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:17,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405228715] [2021-07-09 18:20:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:17,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405228715] [2021-07-09 18:20:17,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405228715] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:17,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:20:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810115921] [2021-07-09 18:20:17,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:20:17,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:20:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:20:17,602 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,648 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2021-07-09 18:20:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:20:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,651 INFO L225 Difference]: With dead ends: 486 [2021-07-09 18:20:17,652 INFO L226 Difference]: Without dead ends: 486 [2021-07-09 18:20:17,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:20:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-09 18:20:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2021-07-09 18:20:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2021-07-09 18:20:17,662 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2021-07-09 18:20:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,662 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2021-07-09 18:20:17,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2021-07-09 18:20:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:17,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,663 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:17,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:20:17,664 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash -314434059, now seen corresponding path program 3 times [2021-07-09 18:20:17,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:17,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940155264] [2021-07-09 18:20:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:17,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940155264] [2021-07-09 18:20:17,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940155264] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:17,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:17,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:20:17,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193225992] [2021-07-09 18:20:17,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:20:17,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:17,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:20:17,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:20:17,699 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:17,769 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2021-07-09 18:20:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:20:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:17,772 INFO L225 Difference]: With dead ends: 438 [2021-07-09 18:20:17,772 INFO L226 Difference]: Without dead ends: 438 [2021-07-09 18:20:17,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:20:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-09 18:20:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2021-07-09 18:20:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-07-09 18:20:17,781 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-07-09 18:20:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:17,781 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-07-09 18:20:17,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-07-09 18:20:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:17,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:17,783 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:17,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:20:17,783 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1825817224, now seen corresponding path program 3 times [2021-07-09 18:20:17,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:17,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102700764] [2021-07-09 18:20:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:17,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102700764] [2021-07-09 18:20:17,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102700764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:17,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813683282] [2021-07-09 18:20:17,814 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 [2021-07-09 18:20:17,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:20:17,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:17,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:20:17,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813683282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:17,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:17,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:20:17,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102714585] [2021-07-09 18:20:17,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:20:17,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:17,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:20:17,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:20:17,957 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:18,191 INFO L93 Difference]: Finished difference Result 994 states and 2769 transitions. [2021-07-09 18:20:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:20:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:18,197 INFO L225 Difference]: With dead ends: 994 [2021-07-09 18:20:18,197 INFO L226 Difference]: Without dead ends: 994 [2021-07-09 18:20:18,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:20:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-09 18:20:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 323. [2021-07-09 18:20:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2021-07-09 18:20:18,213 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2021-07-09 18:20:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:18,214 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2021-07-09 18:20:18,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2021-07-09 18:20:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:18,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:18,216 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:18,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:18,417 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash 156862832, now seen corresponding path program 2 times [2021-07-09 18:20:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:18,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546182214] [2021-07-09 18:20:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:18,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:18,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546182214] [2021-07-09 18:20:18,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546182214] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:18,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:18,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:20:18,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812213053] [2021-07-09 18:20:18,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:20:18,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:18,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:20:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:20:18,459 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:18,566 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2021-07-09 18:20:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:20:18,566 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:18,568 INFO L225 Difference]: With dead ends: 466 [2021-07-09 18:20:18,568 INFO L226 Difference]: Without dead ends: 466 [2021-07-09 18:20:18,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-09 18:20:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2021-07-09 18:20:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2021-07-09 18:20:18,574 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2021-07-09 18:20:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:18,574 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2021-07-09 18:20:18,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,575 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2021-07-09 18:20:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:18,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:18,575 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:18,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 18:20:18,576 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash -2015035522, now seen corresponding path program 4 times [2021-07-09 18:20:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:18,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599326213] [2021-07-09 18:20:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:18,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599326213] [2021-07-09 18:20:18,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599326213] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:18,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:18,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:20:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138533904] [2021-07-09 18:20:18,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:20:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:20:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:20:18,607 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:18,747 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2021-07-09 18:20:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:20:18,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:18,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:18,750 INFO L225 Difference]: With dead ends: 541 [2021-07-09 18:20:18,751 INFO L226 Difference]: Without dead ends: 537 [2021-07-09 18:20:18,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-09 18:20:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2021-07-09 18:20:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2021-07-09 18:20:18,761 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2021-07-09 18:20:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:18,761 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2021-07-09 18:20:18,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2021-07-09 18:20:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:18,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:18,763 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:18,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 18:20:18,763 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash -625514306, now seen corresponding path program 5 times [2021-07-09 18:20:18,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:18,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18240669] [2021-07-09 18:20:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:18,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:18,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18240669] [2021-07-09 18:20:18,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18240669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:18,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430249787] [2021-07-09 18:20:18,822 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 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 [2021-07-09 18:20:18,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:18,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:20:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:18,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430249787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:18,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:18,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:20:18,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588126321] [2021-07-09 18:20:18,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:18,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:18,952 INFO L87 Difference]: Start difference. First operand 276 states and 801 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) [2021-07-09 18:20:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:19,127 INFO L93 Difference]: Finished difference Result 760 states and 2180 transitions. [2021-07-09 18:20:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:20:19,128 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 21 [2021-07-09 18:20:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:19,130 INFO L225 Difference]: With dead ends: 760 [2021-07-09 18:20:19,130 INFO L226 Difference]: Without dead ends: 760 [2021-07-09 18:20:19,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-07-09 18:20:19,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 278. [2021-07-09 18:20:19,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2021-07-09 18:20:19,138 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2021-07-09 18:20:19,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:19,138 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2021-07-09 18:20:19,138 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) [2021-07-09 18:20:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2021-07-09 18:20:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:20:19,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:19,139 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:19,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:19,359 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1157135164, now seen corresponding path program 6 times [2021-07-09 18:20:19,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:19,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981460851] [2021-07-09 18:20:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:19,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981460851] [2021-07-09 18:20:19,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981460851] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:20:19,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:20:19,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:20:19,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576602723] [2021-07-09 18:20:19,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:20:19,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:19,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:20:19,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:20:19,383 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:19,447 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2021-07-09 18:20:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:20:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:20:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:19,449 INFO L225 Difference]: With dead ends: 429 [2021-07-09 18:20:19,449 INFO L226 Difference]: Without dead ends: 425 [2021-07-09 18:20:19,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:20:19,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-07-09 18:20:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2021-07-09 18:20:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2021-07-09 18:20:19,454 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2021-07-09 18:20:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:19,454 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2021-07-09 18:20:19,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2021-07-09 18:20:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:19,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:19,455 INFO L508 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] [2021-07-09 18:20:19,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 18:20:19,455 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:19,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1959126516, now seen corresponding path program 1 times [2021-07-09 18:20:19,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:19,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610146992] [2021-07-09 18:20:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:19,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610146992] [2021-07-09 18:20:19,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610146992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821991487] [2021-07-09 18:20:19,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-07-09 18:20:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:19,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:19,637 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 11 treesize of output 7 [2021-07-09 18:20:19,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:19,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:20:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821991487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:19,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-07-09 18:20:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381629334] [2021-07-09 18:20:19,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:20:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:20:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:20:19,673 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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) [2021-07-09 18:20:19,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:19,729 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2021-07-09 18:20:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:20:19,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 [2021-07-09 18:20:19,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:19,731 INFO L225 Difference]: With dead ends: 552 [2021-07-09 18:20:19,732 INFO L226 Difference]: Without dead ends: 537 [2021-07-09 18:20:19,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:19,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-07-09 18:20:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2021-07-09 18:20:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2021-07-09 18:20:19,739 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2021-07-09 18:20:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:19,739 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2021-07-09 18:20:19,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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) [2021-07-09 18:20:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2021-07-09 18:20:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:19,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:19,740 INFO L508 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] [2021-07-09 18:20:19,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:20:19,956 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:19,957 INFO L82 PathProgramCache]: Analyzing trace with hash 397652553, now seen corresponding path program 1 times [2021-07-09 18:20:19,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:19,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699848694] [2021-07-09 18:20:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:20,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:20,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699848694] [2021-07-09 18:20:20,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699848694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:20,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114719232] [2021-07-09 18:20:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:20:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:20,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:20:20,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:20,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:20,239 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:20:20,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:20,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:20,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:20,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-07-09 18:20:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114719232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:20,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:20,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-07-09 18:20:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471732959] [2021-07-09 18:20:20,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:20:20,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:20:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:20:20,264 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) 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) [2021-07-09 18:20:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:20,632 INFO L93 Difference]: Finished difference Result 586 states and 1678 transitions. [2021-07-09 18:20:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:20:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 24 [2021-07-09 18:20:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:20,634 INFO L225 Difference]: With dead ends: 586 [2021-07-09 18:20:20,634 INFO L226 Difference]: Without dead ends: 571 [2021-07-09 18:20:20,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 348.4ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:20,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-09 18:20:20,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 438. [2021-07-09 18:20:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2021-07-09 18:20:20,642 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2021-07-09 18:20:20,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:20,642 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2021-07-09 18:20:20,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) 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) [2021-07-09 18:20:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2021-07-09 18:20:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:20,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:20,643 INFO L508 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] [2021-07-09 18:20:20,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:20,859 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:20,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash 602801515, now seen corresponding path program 2 times [2021-07-09 18:20:20,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:20,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385678746] [2021-07-09 18:20:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:21,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385678746] [2021-07-09 18:20:21,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385678746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577592606] [2021-07-09 18:20:21,039 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 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 [2021-07-09 18:20:21,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:21,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:21,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:20:21,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:21,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:21,140 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 [2021-07-09 18:20:21,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:21,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:21,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:21,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-07-09 18:20:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:21,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577592606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:21,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-07-09 18:20:21,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957678453] [2021-07-09 18:20:21,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:20:21,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:20:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:20:21,222 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-07-09 18:20:21,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:21,610 INFO L93 Difference]: Finished difference Result 795 states and 2267 transitions. [2021-07-09 18:20:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:20:21,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 [2021-07-09 18:20:21,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:21,613 INFO L225 Difference]: With dead ends: 795 [2021-07-09 18:20:21,613 INFO L226 Difference]: Without dead ends: 780 [2021-07-09 18:20:21,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-07-09 18:20:21,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 439. [2021-07-09 18:20:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2021-07-09 18:20:21,623 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2021-07-09 18:20:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:21,623 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2021-07-09 18:20:21,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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) [2021-07-09 18:20:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2021-07-09 18:20:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:21,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:21,624 INFO L508 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] [2021-07-09 18:20:21,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:20:21,837 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1941464708, now seen corresponding path program 2 times [2021-07-09 18:20:21,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:21,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273394205] [2021-07-09 18:20:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:21,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:21,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273394205] [2021-07-09 18:20:21,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273394205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339023678] [2021-07-09 18:20:21,873 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 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 [2021-07-09 18:20:21,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:21,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:21,948 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 11 treesize of output 7 [2021-07-09 18:20:21,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:21,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:21,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:21,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-09 18:20:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339023678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:21,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:21,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:20:21,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997087812] [2021-07-09 18:20:21,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:20:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:20:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:20:21,976 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-07-09 18:20:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:22,049 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2021-07-09 18:20:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:20:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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 [2021-07-09 18:20:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:22,051 INFO L225 Difference]: With dead ends: 645 [2021-07-09 18:20:22,051 INFO L226 Difference]: Without dead ends: 630 [2021-07-09 18:20:22,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:20:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-07-09 18:20:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2021-07-09 18:20:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2021-07-09 18:20:22,061 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2021-07-09 18:20:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:22,061 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2021-07-09 18:20:22,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 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) [2021-07-09 18:20:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2021-07-09 18:20:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:22,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:22,062 INFO L508 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] [2021-07-09 18:20:22,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:20:22,281 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash -745990585, now seen corresponding path program 3 times [2021-07-09 18:20:22,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:22,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142200204] [2021-07-09 18:20:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:22,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:22,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142200204] [2021-07-09 18:20:22,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142200204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:22,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80997157] [2021-07-09 18:20:22,482 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 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 [2021-07-09 18:20:22,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:20:22,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:22,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:20:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:22,583 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 11 treesize of output 7 [2021-07-09 18:20:22,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:22,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:22,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:22,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-07-09 18:20:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:22,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80997157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:22,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:22,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2021-07-09 18:20:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336659673] [2021-07-09 18:20:22,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:22,616 INFO L87 Difference]: Start difference. First operand 471 states and 1392 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) [2021-07-09 18:20:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:22,791 INFO L93 Difference]: Finished difference Result 592 states and 1679 transitions. [2021-07-09 18:20:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:20:22,792 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 [2021-07-09 18:20:22,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:22,794 INFO L225 Difference]: With dead ends: 592 [2021-07-09 18:20:22,794 INFO L226 Difference]: Without dead ends: 577 [2021-07-09 18:20:22,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:20:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-07-09 18:20:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-07-09 18:20:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2021-07-09 18:20:22,802 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2021-07-09 18:20:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:22,802 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2021-07-09 18:20:22,802 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) [2021-07-09 18:20:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2021-07-09 18:20:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:22,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:22,803 INFO L508 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] [2021-07-09 18:20:23,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:20:23,017 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1226467769, now seen corresponding path program 4 times [2021-07-09 18:20:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:23,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834582028] [2021-07-09 18:20:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:23,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:23,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834582028] [2021-07-09 18:20:23,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834582028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:23,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037389456] [2021-07-09 18:20:23,122 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 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 [2021-07-09 18:20:23,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:20:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:23,230 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 11 treesize of output 7 [2021-07-09 18:20:23,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:23,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:23,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:23,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:3 [2021-07-09 18:20:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:23,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037389456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:23,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:23,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:20:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57021767] [2021-07-09 18:20:23,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:23,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:23,261 INFO L87 Difference]: Start difference. First operand 465 states and 1371 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) [2021-07-09 18:20:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:23,424 INFO L93 Difference]: Finished difference Result 683 states and 1988 transitions. [2021-07-09 18:20:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:20:23,424 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 24 [2021-07-09 18:20:23,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:23,429 INFO L225 Difference]: With dead ends: 683 [2021-07-09 18:20:23,429 INFO L226 Difference]: Without dead ends: 668 [2021-07-09 18:20:23,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-09 18:20:23,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 469. [2021-07-09 18:20:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2021-07-09 18:20:23,452 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2021-07-09 18:20:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:23,453 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2021-07-09 18:20:23,453 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) [2021-07-09 18:20:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2021-07-09 18:20:23,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:20:23,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:23,455 INFO L508 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] [2021-07-09 18:20:23,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:23,671 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:23,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:23,671 INFO L82 PathProgramCache]: Analyzing trace with hash 572535559, now seen corresponding path program 5 times [2021-07-09 18:20:23,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:23,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971243600] [2021-07-09 18:20:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:23,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971243600] [2021-07-09 18:20:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971243600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191616742] [2021-07-09 18:20:23,855 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 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 [2021-07-09 18:20:23,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:20:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:23,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:23,949 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 [2021-07-09 18:20:23,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:23,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:23,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:23,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:28 [2021-07-09 18:20:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:24,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191616742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:24,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:24,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:20:24,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585541264] [2021-07-09 18:20:24,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:20:24,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:20:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:20:24,030 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:24,357 INFO L93 Difference]: Finished difference Result 759 states and 2222 transitions. [2021-07-09 18:20:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:20:24,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:20:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:24,360 INFO L225 Difference]: With dead ends: 759 [2021-07-09 18:20:24,360 INFO L226 Difference]: Without dead ends: 744 [2021-07-09 18:20:24,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-07-09 18:20:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 471. [2021-07-09 18:20:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2021-07-09 18:20:24,370 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2021-07-09 18:20:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:24,370 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2021-07-09 18:20:24,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2021-07-09 18:20:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:24,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:24,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:24,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:24,586 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash 606500413, now seen corresponding path program 3 times [2021-07-09 18:20:24,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:24,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614888016] [2021-07-09 18:20:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:24,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:24,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614888016] [2021-07-09 18:20:24,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614888016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:24,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084655074] [2021-07-09 18:20:24,617 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 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 [2021-07-09 18:20:24,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:20:24,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084655074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:24,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:24,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:20:24,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270220657] [2021-07-09 18:20:24,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:24,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:24,739 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:25,449 INFO L93 Difference]: Finished difference Result 2301 states and 6530 transitions. [2021-07-09 18:20:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:20:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-07-09 18:20:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:25,458 INFO L225 Difference]: With dead ends: 2301 [2021-07-09 18:20:25,458 INFO L226 Difference]: Without dead ends: 2301 [2021-07-09 18:20:25,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=498, Invalid=1664, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:20:25,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-07-09 18:20:25,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 593. [2021-07-09 18:20:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.170608108108108) internal successors, (1877), 592 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1877 transitions. [2021-07-09 18:20:25,480 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1877 transitions. Word has length 27 [2021-07-09 18:20:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:25,480 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1877 transitions. [2021-07-09 18:20:25,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1877 transitions. [2021-07-09 18:20:25,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:25,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:25,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:25,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:25,698 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:25,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash 412599745, now seen corresponding path program 4 times [2021-07-09 18:20:25,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:25,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854985248] [2021-07-09 18:20:25,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:25,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854985248] [2021-07-09 18:20:25,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854985248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:25,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572785823] [2021-07-09 18:20:25,730 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:20:25,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:25,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:25,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:25,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572785823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:20:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807014271] [2021-07-09 18:20:25,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:25,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:25,843 INFO L87 Difference]: Start difference. First operand 593 states and 1877 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:26,480 INFO L93 Difference]: Finished difference Result 2258 states and 6445 transitions. [2021-07-09 18:20:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:20:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-07-09 18:20:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:26,488 INFO L225 Difference]: With dead ends: 2258 [2021-07-09 18:20:26,488 INFO L226 Difference]: Without dead ends: 2258 [2021-07-09 18:20:26,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:20:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-07-09 18:20:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 577. [2021-07-09 18:20:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.1354166666666665) internal successors, (1806), 576 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1806 transitions. [2021-07-09 18:20:26,510 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1806 transitions. Word has length 27 [2021-07-09 18:20:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:26,510 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1806 transitions. [2021-07-09 18:20:26,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1806 transitions. [2021-07-09 18:20:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:26,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:26,511 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:26,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:20:26,728 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1028264061, now seen corresponding path program 5 times [2021-07-09 18:20:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:26,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172302813] [2021-07-09 18:20:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:26,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:26,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172302813] [2021-07-09 18:20:26,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172302813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:26,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252346174] [2021-07-09 18:20:26,785 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 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 [2021-07-09 18:20:26,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:20:26,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:26,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:26,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:26,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252346174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:26,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:26,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:20:26,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132066102] [2021-07-09 18:20:26,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:26,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:26,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:26,891 INFO L87 Difference]: Start difference. First operand 577 states and 1806 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-07-09 18:20:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:27,259 INFO L93 Difference]: Finished difference Result 1609 states and 4647 transitions. [2021-07-09 18:20:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:20:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2021-07-09 18:20:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:27,265 INFO L225 Difference]: With dead ends: 1609 [2021-07-09 18:20:27,265 INFO L226 Difference]: Without dead ends: 1609 [2021-07-09 18:20:27,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-07-09 18:20:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 585. [2021-07-09 18:20:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 3.125) internal successors, (1825), 584 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1825 transitions. [2021-07-09 18:20:27,280 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1825 transitions. Word has length 27 [2021-07-09 18:20:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:27,280 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1825 transitions. [2021-07-09 18:20:27,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-07-09 18:20:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1825 transitions. [2021-07-09 18:20:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:27,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:27,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:27,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:27,497 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:27,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:27,497 INFO L82 PathProgramCache]: Analyzing trace with hash -954973550, now seen corresponding path program 6 times [2021-07-09 18:20:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:27,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789123863] [2021-07-09 18:20:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:27,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:27,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789123863] [2021-07-09 18:20:27,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789123863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:27,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689276708] [2021-07-09 18:20:27,529 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 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 [2021-07-09 18:20:27,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:20:27,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:27,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:27,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689276708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:27,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:27,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:20:27,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838363289] [2021-07-09 18:20:27,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:27,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:27,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:27,635 INFO L87 Difference]: Start difference. First operand 585 states and 1825 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-07-09 18:20:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:28,001 INFO L93 Difference]: Finished difference Result 1639 states and 4720 transitions. [2021-07-09 18:20:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:20:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-07-09 18:20:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:28,005 INFO L225 Difference]: With dead ends: 1639 [2021-07-09 18:20:28,005 INFO L226 Difference]: Without dead ends: 1639 [2021-07-09 18:20:28,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-07-09 18:20:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 596. [2021-07-09 18:20:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.104201680672269) internal successors, (1847), 595 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1847 transitions. [2021-07-09 18:20:28,019 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1847 transitions. Word has length 27 [2021-07-09 18:20:28,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:28,019 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1847 transitions. [2021-07-09 18:20:28,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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) [2021-07-09 18:20:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1847 transitions. [2021-07-09 18:20:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:28,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:28,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:28,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:20:28,230 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:28,231 INFO L82 PathProgramCache]: Analyzing trace with hash -535240646, now seen corresponding path program 6 times [2021-07-09 18:20:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:28,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441283991] [2021-07-09 18:20:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:28,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:28,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441283991] [2021-07-09 18:20:28,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441283991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:28,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806633888] [2021-07-09 18:20:28,258 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 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 [2021-07-09 18:20:28,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:20:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:28,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806633888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:28,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:28,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:20:28,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48166234] [2021-07-09 18:20:28,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:20:28,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:28,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:20:28,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:28,337 INFO L87 Difference]: Start difference. First operand 596 states and 1847 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-09 18:20:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:28,468 INFO L93 Difference]: Finished difference Result 1374 states and 4109 transitions. [2021-07-09 18:20:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:20:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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 27 [2021-07-09 18:20:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:28,472 INFO L225 Difference]: With dead ends: 1374 [2021-07-09 18:20:28,472 INFO L226 Difference]: Without dead ends: 1350 [2021-07-09 18:20:28,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:20:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-09 18:20:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 911. [2021-07-09 18:20:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.197802197802198) internal successors, (2910), 910 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2910 transitions. [2021-07-09 18:20:28,503 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2910 transitions. Word has length 27 [2021-07-09 18:20:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:28,503 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 2910 transitions. [2021-07-09 18:20:28,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 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) [2021-07-09 18:20:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2910 transitions. [2021-07-09 18:20:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:28,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:28,505 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:28,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:20:28,720 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1446478511, now seen corresponding path program 1 times [2021-07-09 18:20:28,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:28,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183753746] [2021-07-09 18:20:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:28,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:28,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183753746] [2021-07-09 18:20:28,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183753746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:28,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542511132] [2021-07-09 18:20:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:20:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542511132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:28,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:28,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:20:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783948443] [2021-07-09 18:20:28,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:28,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:28,850 INFO L87 Difference]: Start difference. First operand 911 states and 2910 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) [2021-07-09 18:20:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:29,107 INFO L93 Difference]: Finished difference Result 1491 states and 4323 transitions. [2021-07-09 18:20:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:20:29,107 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 27 [2021-07-09 18:20:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:29,112 INFO L225 Difference]: With dead ends: 1491 [2021-07-09 18:20:29,112 INFO L226 Difference]: Without dead ends: 1465 [2021-07-09 18:20:29,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:20:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-07-09 18:20:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 969. [2021-07-09 18:20:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.145661157024793) internal successors, (3045), 968 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3045 transitions. [2021-07-09 18:20:29,141 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3045 transitions. Word has length 27 [2021-07-09 18:20:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:29,141 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3045 transitions. [2021-07-09 18:20:29,142 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) [2021-07-09 18:20:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3045 transitions. [2021-07-09 18:20:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:29,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:29,144 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:29,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:20:29,357 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1928537542, now seen corresponding path program 7 times [2021-07-09 18:20:29,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:29,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305817934] [2021-07-09 18:20:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:29,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:29,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305817934] [2021-07-09 18:20:29,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305817934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:29,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159468522] [2021-07-09 18:20:29,394 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 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 [2021-07-09 18:20:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:29,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159468522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:29,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:29,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:20:29,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979362469] [2021-07-09 18:20:29,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:29,496 INFO L87 Difference]: Start difference. First operand 969 states and 3045 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-07-09 18:20:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:29,666 INFO L93 Difference]: Finished difference Result 1664 states and 5013 transitions. [2021-07-09 18:20:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:20:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 27 [2021-07-09 18:20:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:29,669 INFO L225 Difference]: With dead ends: 1664 [2021-07-09 18:20:29,669 INFO L226 Difference]: Without dead ends: 1632 [2021-07-09 18:20:29,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:20:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-07-09 18:20:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1122. [2021-07-09 18:20:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 3.1793041926851027) internal successors, (3564), 1121 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3564 transitions. [2021-07-09 18:20:29,689 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3564 transitions. Word has length 27 [2021-07-09 18:20:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:29,689 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3564 transitions. [2021-07-09 18:20:29,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-07-09 18:20:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3564 transitions. [2021-07-09 18:20:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:29,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:29,691 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:29,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:20:29,905 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash -337091691, now seen corresponding path program 2 times [2021-07-09 18:20:29,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:29,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888267061] [2021-07-09 18:20:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:29,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888267061] [2021-07-09 18:20:29,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888267061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:29,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456158901] [2021-07-09 18:20:29,935 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 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 [2021-07-09 18:20:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:29,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456158901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:30,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:30,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:20:30,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028322909] [2021-07-09 18:20:30,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:30,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:30,025 INFO L87 Difference]: Start difference. First operand 1122 states and 3564 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) [2021-07-09 18:20:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:30,294 INFO L93 Difference]: Finished difference Result 1812 states and 5305 transitions. [2021-07-09 18:20:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:20:30,294 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 27 [2021-07-09 18:20:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:30,297 INFO L225 Difference]: With dead ends: 1812 [2021-07-09 18:20:30,298 INFO L226 Difference]: Without dead ends: 1790 [2021-07-09 18:20:30,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:20:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-07-09 18:20:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1115. [2021-07-09 18:20:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 1114 states have (on average 3.1867145421903054) internal successors, (3550), 1114 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 3550 transitions. [2021-07-09 18:20:30,320 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 3550 transitions. Word has length 27 [2021-07-09 18:20:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:30,320 INFO L482 AbstractCegarLoop]: Abstraction has 1115 states and 3550 transitions. [2021-07-09 18:20:30,320 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) [2021-07-09 18:20:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 3550 transitions. [2021-07-09 18:20:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:30,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:30,322 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:30,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:30,541 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash 570714739, now seen corresponding path program 3 times [2021-07-09 18:20:30,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:30,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621765202] [2021-07-09 18:20:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:30,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:30,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621765202] [2021-07-09 18:20:30,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621765202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:30,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034261001] [2021-07-09 18:20:30,573 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 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 [2021-07-09 18:20:30,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:20:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:30,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034261001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:30,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:30,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:20:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556725585] [2021-07-09 18:20:30,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:30,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:30,651 INFO L87 Difference]: Start difference. First operand 1115 states and 3550 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:30,865 INFO L93 Difference]: Finished difference Result 2086 states and 6158 transitions. [2021-07-09 18:20:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:20:30,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-07-09 18:20:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:30,869 INFO L225 Difference]: With dead ends: 2086 [2021-07-09 18:20:30,869 INFO L226 Difference]: Without dead ends: 2060 [2021-07-09 18:20:30,869 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-07-09 18:20:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1141. [2021-07-09 18:20:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.207894736842105) internal successors, (3657), 1140 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:30,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3657 transitions. [2021-07-09 18:20:30,891 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3657 transitions. Word has length 27 [2021-07-09 18:20:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:30,892 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3657 transitions. [2021-07-09 18:20:30,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:30,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3657 transitions. [2021-07-09 18:20:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:30,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:30,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:31,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:20:31,109 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2074608542, now seen corresponding path program 7 times [2021-07-09 18:20:31,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:31,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124979377] [2021-07-09 18:20:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:31,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:31,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124979377] [2021-07-09 18:20:31,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124979377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:31,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188403782] [2021-07-09 18:20:31,133 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 [2021-07-09 18:20:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:31,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188403782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:31,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:31,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 18:20:31,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793031167] [2021-07-09 18:20:31,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:20:31,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:20:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:31,206 INFO L87 Difference]: Start difference. First operand 1141 states and 3657 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-07-09 18:20:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:31,342 INFO L93 Difference]: Finished difference Result 1777 states and 5270 transitions. [2021-07-09 18:20:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:20:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 27 [2021-07-09 18:20:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:31,367 INFO L225 Difference]: With dead ends: 1777 [2021-07-09 18:20:31,367 INFO L226 Difference]: Without dead ends: 1777 [2021-07-09 18:20:31,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-07-09 18:20:31,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1147. [2021-07-09 18:20:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.1928446771378707) internal successors, (3659), 1146 states have internal predecessors, (3659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3659 transitions. [2021-07-09 18:20:31,388 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3659 transitions. Word has length 27 [2021-07-09 18:20:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:31,388 INFO L482 AbstractCegarLoop]: Abstraction has 1147 states and 3659 transitions. [2021-07-09 18:20:31,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-07-09 18:20:31,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3659 transitions. [2021-07-09 18:20:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:31,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:31,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:31,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 18:20:31,597 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1728029405, now seen corresponding path program 8 times [2021-07-09 18:20:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:31,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092298142] [2021-07-09 18:20:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:31,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:31,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092298142] [2021-07-09 18:20:31,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092298142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:31,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180855291] [2021-07-09 18:20:31,625 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:20:31,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:31,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:31,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:31,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:31,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180855291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:31,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:31,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:20:31,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301329039] [2021-07-09 18:20:31,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:31,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:31,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:31,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:31,715 INFO L87 Difference]: Start difference. First operand 1147 states and 3659 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) [2021-07-09 18:20:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:32,239 INFO L93 Difference]: Finished difference Result 4076 states and 11819 transitions. [2021-07-09 18:20:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:20:32,239 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 27 [2021-07-09 18:20:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:32,247 INFO L225 Difference]: With dead ends: 4076 [2021-07-09 18:20:32,247 INFO L226 Difference]: Without dead ends: 4076 [2021-07-09 18:20:32,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:20:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-07-09 18:20:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 1262. [2021-07-09 18:20:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.274385408406027) internal successors, (4129), 1261 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4129 transitions. [2021-07-09 18:20:32,301 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4129 transitions. Word has length 27 [2021-07-09 18:20:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:32,301 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 4129 transitions. [2021-07-09 18:20:32,301 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) [2021-07-09 18:20:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4129 transitions. [2021-07-09 18:20:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:32,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:32,304 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:32,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:32,520 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:32,520 INFO L82 PathProgramCache]: Analyzing trace with hash -584257835, now seen corresponding path program 4 times [2021-07-09 18:20:32,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:32,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782599733] [2021-07-09 18:20:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:32,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:32,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782599733] [2021-07-09 18:20:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782599733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:32,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789465295] [2021-07-09 18:20:32,556 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 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 [2021-07-09 18:20:32,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:32,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:32,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:32,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789465295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:32,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:32,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:20:32,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656094514] [2021-07-09 18:20:32,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:32,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:32,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:32,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:32,640 INFO L87 Difference]: Start difference. First operand 1262 states and 4129 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:32,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:32,879 INFO L93 Difference]: Finished difference Result 2048 states and 6254 transitions. [2021-07-09 18:20:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:20:32,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-07-09 18:20:32,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:32,884 INFO L225 Difference]: With dead ends: 2048 [2021-07-09 18:20:32,884 INFO L226 Difference]: Without dead ends: 2048 [2021-07-09 18:20:32,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:32,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-07-09 18:20:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1280. [2021-07-09 18:20:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2752150117279126) internal successors, (4189), 1279 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4189 transitions. [2021-07-09 18:20:32,906 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4189 transitions. Word has length 27 [2021-07-09 18:20:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:32,906 INFO L482 AbstractCegarLoop]: Abstraction has 1280 states and 4189 transitions. [2021-07-09 18:20:32,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4189 transitions. [2021-07-09 18:20:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:32,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:32,909 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:33,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:20:33,121 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1538811107, now seen corresponding path program 9 times [2021-07-09 18:20:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:33,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234761599] [2021-07-09 18:20:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:33,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:33,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234761599] [2021-07-09 18:20:33,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234761599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:33,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005034783] [2021-07-09 18:20:33,157 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 [2021-07-09 18:20:33,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:20:33,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:33,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005034783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:33,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:33,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:20:33,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828898962] [2021-07-09 18:20:33,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:33,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:33,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:33,235 INFO L87 Difference]: Start difference. First operand 1280 states and 4189 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) [2021-07-09 18:20:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:33,782 INFO L93 Difference]: Finished difference Result 3885 states and 11397 transitions. [2021-07-09 18:20:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:20:33,783 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 27 [2021-07-09 18:20:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:33,789 INFO L225 Difference]: With dead ends: 3885 [2021-07-09 18:20:33,789 INFO L226 Difference]: Without dead ends: 3877 [2021-07-09 18:20:33,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:33,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2021-07-09 18:20:33,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1292. [2021-07-09 18:20:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.260263361735089) internal successors, (4209), 1291 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4209 transitions. [2021-07-09 18:20:33,826 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4209 transitions. Word has length 27 [2021-07-09 18:20:33,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:33,826 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4209 transitions. [2021-07-09 18:20:33,826 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) [2021-07-09 18:20:33,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4209 transitions. [2021-07-09 18:20:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:33,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:33,828 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:34,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:34,044 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1366634973, now seen corresponding path program 10 times [2021-07-09 18:20:34,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:34,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721832158] [2021-07-09 18:20:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:34,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:34,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721832158] [2021-07-09 18:20:34,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721832158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:34,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830987276] [2021-07-09 18:20:34,082 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 [2021-07-09 18:20:34,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:34,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:34,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830987276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:34,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:34,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:20:34,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107274544] [2021-07-09 18:20:34,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:34,183 INFO L87 Difference]: Start difference. First operand 1292 states and 4209 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:34,865 INFO L93 Difference]: Finished difference Result 3967 states and 11593 transitions. [2021-07-09 18:20:34,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:20:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-07-09 18:20:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:34,872 INFO L225 Difference]: With dead ends: 3967 [2021-07-09 18:20:34,872 INFO L226 Difference]: Without dead ends: 3967 [2021-07-09 18:20:34,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=423, Invalid=1299, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:20:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-07-09 18:20:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1392. [2021-07-09 18:20:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.250179726815241) internal successors, (4521), 1391 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4521 transitions. [2021-07-09 18:20:34,908 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4521 transitions. Word has length 27 [2021-07-09 18:20:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:34,908 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4521 transitions. [2021-07-09 18:20:34,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4521 transitions. [2021-07-09 18:20:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:34,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:34,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:35,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:20:35,125 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 416014497, now seen corresponding path program 11 times [2021-07-09 18:20:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145801167] [2021-07-09 18:20:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:35,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:35,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145801167] [2021-07-09 18:20:35,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145801167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:35,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103732792] [2021-07-09 18:20:35,162 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 [2021-07-09 18:20:35,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:20:35,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:35,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:35,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103732792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:35,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:35,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:20:35,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938426489] [2021-07-09 18:20:35,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:35,251 INFO L87 Difference]: Start difference. First operand 1392 states and 4521 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:35,902 INFO L93 Difference]: Finished difference Result 3712 states and 10972 transitions. [2021-07-09 18:20:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:20:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-07-09 18:20:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:35,908 INFO L225 Difference]: With dead ends: 3712 [2021-07-09 18:20:35,908 INFO L226 Difference]: Without dead ends: 3704 [2021-07-09 18:20:35,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=376, Invalid=1106, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:20:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-07-09 18:20:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 1392. [2021-07-09 18:20:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.2473040977713876) internal successors, (4517), 1391 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4517 transitions. [2021-07-09 18:20:35,940 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4517 transitions. Word has length 27 [2021-07-09 18:20:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:35,940 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4517 transitions. [2021-07-09 18:20:35,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:35,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4517 transitions. [2021-07-09 18:20:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:35,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:35,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:36,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:20:36,158 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:36,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:36,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1631157469, now seen corresponding path program 12 times [2021-07-09 18:20:36,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:36,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138204917] [2021-07-09 18:20:36,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:36,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138204917] [2021-07-09 18:20:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138204917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215397789] [2021-07-09 18:20:36,189 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 [2021-07-09 18:20:36,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:20:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:36,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:36,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215397789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:36,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:36,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:20:36,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971407272] [2021-07-09 18:20:36,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:36,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:36,305 INFO L87 Difference]: Start difference. First operand 1392 states and 4517 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:20:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:36,665 INFO L93 Difference]: Finished difference Result 3014 states and 9077 transitions. [2021-07-09 18:20:36,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:20:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-07-09 18:20:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:36,671 INFO L225 Difference]: With dead ends: 3014 [2021-07-09 18:20:36,671 INFO L226 Difference]: Without dead ends: 3014 [2021-07-09 18:20:36,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:20:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2021-07-09 18:20:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 1410. [2021-07-09 18:20:36,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.2462739531582683) internal successors, (4574), 1409 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4574 transitions. [2021-07-09 18:20:36,706 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4574 transitions. Word has length 27 [2021-07-09 18:20:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:36,707 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4574 transitions. [2021-07-09 18:20:36,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:20:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4574 transitions. [2021-07-09 18:20:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:36,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:36,710 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:36,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:20:36,917 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:36,917 INFO L82 PathProgramCache]: Analyzing trace with hash 733023956, now seen corresponding path program 8 times [2021-07-09 18:20:36,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:36,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481431349] [2021-07-09 18:20:36,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:36,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:36,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481431349] [2021-07-09 18:20:36,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481431349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959117010] [2021-07-09 18:20:36,956 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 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 [2021-07-09 18:20:36,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:36,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:37,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959117010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:37,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:37,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:20:37,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318767549] [2021-07-09 18:20:37,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:37,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:37,040 INFO L87 Difference]: Start difference. First operand 1410 states and 4574 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) [2021-07-09 18:20:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:37,399 INFO L93 Difference]: Finished difference Result 3028 states and 9102 transitions. [2021-07-09 18:20:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:20:37,399 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 27 [2021-07-09 18:20:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:37,403 INFO L225 Difference]: With dead ends: 3028 [2021-07-09 18:20:37,403 INFO L226 Difference]: Without dead ends: 3028 [2021-07-09 18:20:37,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:20:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-07-09 18:20:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1426. [2021-07-09 18:20:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.2435087719298243) internal successors, (4622), 1425 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4622 transitions. [2021-07-09 18:20:37,431 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4622 transitions. Word has length 27 [2021-07-09 18:20:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:37,431 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4622 transitions. [2021-07-09 18:20:37,431 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) [2021-07-09 18:20:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4622 transitions. [2021-07-09 18:20:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:37,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:37,433 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:37,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:20:37,649 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:37,649 INFO L82 PathProgramCache]: Analyzing trace with hash 645299584, now seen corresponding path program 9 times [2021-07-09 18:20:37,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:37,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559813201] [2021-07-09 18:20:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:37,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:37,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559813201] [2021-07-09 18:20:37,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559813201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:37,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703233837] [2021-07-09 18:20:37,679 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 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 [2021-07-09 18:20:37,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:20:37,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:37,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:37,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703233837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:37,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:37,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:20:37,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334000768] [2021-07-09 18:20:37,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:37,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:37,767 INFO L87 Difference]: Start difference. First operand 1426 states and 4622 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) [2021-07-09 18:20:38,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:38,257 INFO L93 Difference]: Finished difference Result 3515 states and 10389 transitions. [2021-07-09 18:20:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:20:38,257 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 27 [2021-07-09 18:20:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:38,263 INFO L225 Difference]: With dead ends: 3515 [2021-07-09 18:20:38,263 INFO L226 Difference]: Without dead ends: 3515 [2021-07-09 18:20:38,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-07-09 18:20:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 1494. [2021-07-09 18:20:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.2391158740790353) internal successors, (4836), 1493 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 4836 transitions. [2021-07-09 18:20:38,349 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 4836 transitions. Word has length 27 [2021-07-09 18:20:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:38,349 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 4836 transitions. [2021-07-09 18:20:38,349 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) [2021-07-09 18:20:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 4836 transitions. [2021-07-09 18:20:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:38,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:38,352 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:38,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:20:38,565 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash 317969308, now seen corresponding path program 10 times [2021-07-09 18:20:38,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:38,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982825572] [2021-07-09 18:20:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:38,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982825572] [2021-07-09 18:20:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982825572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:38,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831060823] [2021-07-09 18:20:38,593 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 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 [2021-07-09 18:20:38,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:38,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:38,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:38,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831060823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:38,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:38,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:20:38,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426808547] [2021-07-09 18:20:38,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:38,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:38,692 INFO L87 Difference]: Start difference. First operand 1494 states and 4836 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-07-09 18:20:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:39,023 INFO L93 Difference]: Finished difference Result 3812 states and 11703 transitions. [2021-07-09 18:20:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:20:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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 27 [2021-07-09 18:20:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:39,031 INFO L225 Difference]: With dead ends: 3812 [2021-07-09 18:20:39,031 INFO L226 Difference]: Without dead ends: 3805 [2021-07-09 18:20:39,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:20:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-07-09 18:20:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 2152. [2021-07-09 18:20:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3421664342166433) internal successors, (7189), 2151 states have internal predecessors, (7189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7189 transitions. [2021-07-09 18:20:39,075 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7189 transitions. Word has length 27 [2021-07-09 18:20:39,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:39,075 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 7189 transitions. [2021-07-09 18:20:39,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 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) [2021-07-09 18:20:39,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7189 transitions. [2021-07-09 18:20:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:39,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:39,079 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:39,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:39,294 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1267266998, now seen corresponding path program 11 times [2021-07-09 18:20:39,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:39,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234321716] [2021-07-09 18:20:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:39,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:39,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234321716] [2021-07-09 18:20:39,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234321716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:39,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526499200] [2021-07-09 18:20:39,327 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 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 [2021-07-09 18:20:39,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:20:39,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:39,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526499200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:39,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:39,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:20:39,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136112551] [2021-07-09 18:20:39,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:39,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:39,448 INFO L87 Difference]: Start difference. First operand 2152 states and 7189 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-07-09 18:20:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:39,752 INFO L93 Difference]: Finished difference Result 3889 states and 11952 transitions. [2021-07-09 18:20:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:20:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 27 [2021-07-09 18:20:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:39,760 INFO L225 Difference]: With dead ends: 3889 [2021-07-09 18:20:39,760 INFO L226 Difference]: Without dead ends: 3889 [2021-07-09 18:20:39,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:20:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-07-09 18:20:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 2116. [2021-07-09 18:20:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 3.315839243498818) internal successors, (7013), 2115 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 7013 transitions. [2021-07-09 18:20:39,798 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 7013 transitions. Word has length 27 [2021-07-09 18:20:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:39,798 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 7013 transitions. [2021-07-09 18:20:39,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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) [2021-07-09 18:20:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 7013 transitions. [2021-07-09 18:20:39,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:39,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:39,802 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:40,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:40,010 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:40,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:40,010 INFO L82 PathProgramCache]: Analyzing trace with hash -904631356, now seen corresponding path program 12 times [2021-07-09 18:20:40,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:40,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803178387] [2021-07-09 18:20:40,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:40,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803178387] [2021-07-09 18:20:40,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803178387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287081901] [2021-07-09 18:20:40,043 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 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 [2021-07-09 18:20:40,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:20:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:40,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287081901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:40,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:40,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:20:40,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382070286] [2021-07-09 18:20:40,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:40,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:40,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:40,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:40,171 INFO L87 Difference]: Start difference. First operand 2116 states and 7013 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) [2021-07-09 18:20:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:40,630 INFO L93 Difference]: Finished difference Result 3915 states and 12164 transitions. [2021-07-09 18:20:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:20:40,630 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 27 [2021-07-09 18:20:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:40,638 INFO L225 Difference]: With dead ends: 3915 [2021-07-09 18:20:40,638 INFO L226 Difference]: Without dead ends: 3911 [2021-07-09 18:20:40,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-07-09 18:20:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 2114. [2021-07-09 18:20:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 3.313771888310459) internal successors, (7002), 2113 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:40,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 7002 transitions. [2021-07-09 18:20:40,678 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 7002 transitions. Word has length 27 [2021-07-09 18:20:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:40,678 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 7002 transitions. [2021-07-09 18:20:40,678 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) [2021-07-09 18:20:40,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 7002 transitions. [2021-07-09 18:20:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:40,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:40,682 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:40,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:20:40,897 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash 741045571, now seen corresponding path program 5 times [2021-07-09 18:20:40,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:40,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179597101] [2021-07-09 18:20:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:40,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179597101] [2021-07-09 18:20:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179597101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066367296] [2021-07-09 18:20:40,924 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 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 [2021-07-09 18:20:40,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:40,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:40,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:40,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:41,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066367296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:41,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:41,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:20:41,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505412256] [2021-07-09 18:20:41,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:41,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:41,015 INFO L87 Difference]: Start difference. First operand 2114 states and 7002 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) [2021-07-09 18:20:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:41,357 INFO L93 Difference]: Finished difference Result 3295 states and 10178 transitions. [2021-07-09 18:20:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:20:41,357 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 27 [2021-07-09 18:20:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:41,362 INFO L225 Difference]: With dead ends: 3295 [2021-07-09 18:20:41,362 INFO L226 Difference]: Without dead ends: 3280 [2021-07-09 18:20:41,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-07-09 18:20:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2176. [2021-07-09 18:20:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.331494252873563) internal successors, (7246), 2175 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7246 transitions. [2021-07-09 18:20:41,402 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7246 transitions. Word has length 27 [2021-07-09 18:20:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:41,403 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 7246 transitions. [2021-07-09 18:20:41,403 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) [2021-07-09 18:20:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7246 transitions. [2021-07-09 18:20:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:41,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:41,406 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:41,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:41,622 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:41,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:41,622 INFO L82 PathProgramCache]: Analyzing trace with hash 989889791, now seen corresponding path program 6 times [2021-07-09 18:20:41,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:41,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418479744] [2021-07-09 18:20:41,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:41,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418479744] [2021-07-09 18:20:41,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418479744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:41,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840790463] [2021-07-09 18:20:41,649 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 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 [2021-07-09 18:20:41,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:20:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:41,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:41,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840790463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:41,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:41,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:20:41,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886352455] [2021-07-09 18:20:41,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:41,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:41,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:41,742 INFO L87 Difference]: Start difference. First operand 2176 states and 7246 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) [2021-07-09 18:20:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:42,030 INFO L93 Difference]: Finished difference Result 3360 states and 10395 transitions. [2021-07-09 18:20:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:20:42,030 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 27 [2021-07-09 18:20:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:42,037 INFO L225 Difference]: With dead ends: 3360 [2021-07-09 18:20:42,037 INFO L226 Difference]: Without dead ends: 3360 [2021-07-09 18:20:42,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-07-09 18:20:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2143. [2021-07-09 18:20:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.316526610644258) internal successors, (7104), 2142 states have internal predecessors, (7104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7104 transitions. [2021-07-09 18:20:42,078 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7104 transitions. Word has length 27 [2021-07-09 18:20:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:42,078 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7104 transitions. [2021-07-09 18:20:42,078 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) [2021-07-09 18:20:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7104 transitions. [2021-07-09 18:20:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:42,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:42,082 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:20:42,292 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1160574596, now seen corresponding path program 13 times [2021-07-09 18:20:42,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:42,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280725948] [2021-07-09 18:20:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:42,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280725948] [2021-07-09 18:20:42,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280725948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:42,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424129707] [2021-07-09 18:20:42,329 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 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 [2021-07-09 18:20:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:42,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424129707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:42,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:42,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:20:42,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643832135] [2021-07-09 18:20:42,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:42,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:42,502 INFO L87 Difference]: Start difference. First operand 2143 states and 7104 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:43,327 INFO L93 Difference]: Finished difference Result 6236 states and 18781 transitions. [2021-07-09 18:20:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:20:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-07-09 18:20:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:43,339 INFO L225 Difference]: With dead ends: 6236 [2021-07-09 18:20:43,339 INFO L226 Difference]: Without dead ends: 6236 [2021-07-09 18:20:43,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 438.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:20:43,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-07-09 18:20:43,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 2154. [2021-07-09 18:20:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 2153 states have (on average 3.32559219693451) internal successors, (7160), 2153 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 7160 transitions. [2021-07-09 18:20:43,407 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 7160 transitions. Word has length 27 [2021-07-09 18:20:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:43,407 INFO L482 AbstractCegarLoop]: Abstraction has 2154 states and 7160 transitions. [2021-07-09 18:20:43,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 7160 transitions. [2021-07-09 18:20:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:43,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:43,412 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:43,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:43,613 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:43,613 INFO L82 PathProgramCache]: Analyzing trace with hash 966673928, now seen corresponding path program 14 times [2021-07-09 18:20:43,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:43,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014905411] [2021-07-09 18:20:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:43,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014905411] [2021-07-09 18:20:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014905411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:43,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873625180] [2021-07-09 18:20:43,657 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 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 [2021-07-09 18:20:43,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:43,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873625180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:43,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:43,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:20:43,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440804448] [2021-07-09 18:20:43,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:43,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:43,800 INFO L87 Difference]: Start difference. First operand 2154 states and 7160 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:44,606 INFO L93 Difference]: Finished difference Result 6112 states and 18481 transitions. [2021-07-09 18:20:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:20:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2021-07-09 18:20:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:44,616 INFO L225 Difference]: With dead ends: 6112 [2021-07-09 18:20:44,616 INFO L226 Difference]: Without dead ends: 6112 [2021-07-09 18:20:44,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 427.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:20:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-07-09 18:20:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 2135. [2021-07-09 18:20:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 3.3130271790065606) internal successors, (7070), 2134 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) [2021-07-09 18:20:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 7070 transitions. [2021-07-09 18:20:44,663 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 7070 transitions. Word has length 27 [2021-07-09 18:20:44,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:44,663 INFO L482 AbstractCegarLoop]: Abstraction has 2135 states and 7070 transitions. [2021-07-09 18:20:44,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2021-07-09 18:20:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 7070 transitions. [2021-07-09 18:20:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:44,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:44,666 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:44,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:20:44,867 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1779667311, now seen corresponding path program 7 times [2021-07-09 18:20:44,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:44,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641120284] [2021-07-09 18:20:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:44,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:44,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641120284] [2021-07-09 18:20:44,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641120284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:44,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180383423] [2021-07-09 18:20:44,900 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 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 [2021-07-09 18:20:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:44,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:44,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180383423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:44,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:44,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:20:44,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54445621] [2021-07-09 18:20:44,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:44,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:44,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:44,969 INFO L87 Difference]: Start difference. First operand 2135 states and 7070 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:45,142 INFO L93 Difference]: Finished difference Result 3444 states and 10974 transitions. [2021-07-09 18:20:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:20:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-07-09 18:20:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:45,147 INFO L225 Difference]: With dead ends: 3444 [2021-07-09 18:20:45,147 INFO L226 Difference]: Without dead ends: 3418 [2021-07-09 18:20:45,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-07-09 18:20:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 2593. [2021-07-09 18:20:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2592 states have (on average 3.3599537037037037) internal successors, (8709), 2592 states have internal predecessors, (8709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 8709 transitions. [2021-07-09 18:20:45,184 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 8709 transitions. Word has length 27 [2021-07-09 18:20:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:45,184 INFO L482 AbstractCegarLoop]: Abstraction has 2593 states and 8709 transitions. [2021-07-09 18:20:45,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 8709 transitions. [2021-07-09 18:20:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:45,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:45,188 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:45,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:20:45,389 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1360327411, now seen corresponding path program 8 times [2021-07-09 18:20:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919295325] [2021-07-09 18:20:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:45,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:45,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919295325] [2021-07-09 18:20:45,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919295325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:45,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897050969] [2021-07-09 18:20:45,424 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 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 [2021-07-09 18:20:45,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:45,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897050969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:45,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:45,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:20:45,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932134587] [2021-07-09 18:20:45,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:45,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:45,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:45,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:45,496 INFO L87 Difference]: Start difference. First operand 2593 states and 8709 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:45,667 INFO L93 Difference]: Finished difference Result 3554 states and 11351 transitions. [2021-07-09 18:20:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:20:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 27 [2021-07-09 18:20:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:45,673 INFO L225 Difference]: With dead ends: 3554 [2021-07-09 18:20:45,673 INFO L226 Difference]: Without dead ends: 3554 [2021-07-09 18:20:45,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-07-09 18:20:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2611. [2021-07-09 18:20:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 3.3555555555555556) internal successors, (8758), 2610 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 8758 transitions. [2021-07-09 18:20:45,721 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 8758 transitions. Word has length 27 [2021-07-09 18:20:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:45,721 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 8758 transitions. [2021-07-09 18:20:45,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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) [2021-07-09 18:20:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 8758 transitions. [2021-07-09 18:20:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:45,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:45,725 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:45,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:20:45,941 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:45,941 INFO L82 PathProgramCache]: Analyzing trace with hash -260473223, now seen corresponding path program 13 times [2021-07-09 18:20:45,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:45,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944737565] [2021-07-09 18:20:45,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:45,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944737565] [2021-07-09 18:20:45,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944737565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:45,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987785505] [2021-07-09 18:20:45,972 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 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 [2021-07-09 18:20:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:45,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:46,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987785505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:46,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:46,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:20:46,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526307618] [2021-07-09 18:20:46,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:46,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:46,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:46,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:46,065 INFO L87 Difference]: Start difference. First operand 2611 states and 8758 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-09 18:20:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:46,620 INFO L93 Difference]: Finished difference Result 8012 states and 25327 transitions. [2021-07-09 18:20:46,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:20:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 27 [2021-07-09 18:20:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:46,634 INFO L225 Difference]: With dead ends: 8012 [2021-07-09 18:20:46,634 INFO L226 Difference]: Without dead ends: 8012 [2021-07-09 18:20:46,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 310.1ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:20:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-07-09 18:20:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 3370. [2021-07-09 18:20:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 3.4579994063520334) internal successors, (11650), 3369 states have internal predecessors, (11650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 11650 transitions. [2021-07-09 18:20:46,730 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 11650 transitions. Word has length 27 [2021-07-09 18:20:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:46,730 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 11650 transitions. [2021-07-09 18:20:46,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-09 18:20:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 11650 transitions. [2021-07-09 18:20:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:46,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:46,737 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:46,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:20:46,952 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:46,952 INFO L82 PathProgramCache]: Analyzing trace with hash -454373891, now seen corresponding path program 14 times [2021-07-09 18:20:46,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:46,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428370471] [2021-07-09 18:20:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:46,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428370471] [2021-07-09 18:20:46,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428370471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434167237] [2021-07-09 18:20:46,984 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 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 [2021-07-09 18:20:47,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:47,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:47,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:47,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434167237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:47,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:47,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:20:47,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544634273] [2021-07-09 18:20:47,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:47,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:47,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:47,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:47,073 INFO L87 Difference]: Start difference. First operand 3370 states and 11650 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-09 18:20:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:47,628 INFO L93 Difference]: Finished difference Result 7985 states and 25267 transitions. [2021-07-09 18:20:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:20:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 27 [2021-07-09 18:20:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:47,642 INFO L225 Difference]: With dead ends: 7985 [2021-07-09 18:20:47,642 INFO L226 Difference]: Without dead ends: 7985 [2021-07-09 18:20:47,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:20:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-07-09 18:20:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 3369. [2021-07-09 18:20:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.4557600950118763) internal successors, (11639), 3368 states have internal predecessors, (11639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 11639 transitions. [2021-07-09 18:20:47,733 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 11639 transitions. Word has length 27 [2021-07-09 18:20:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:47,734 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 11639 transitions. [2021-07-09 18:20:47,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-07-09 18:20:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 11639 transitions. [2021-07-09 18:20:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:47,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:47,739 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:47,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:47,940 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1213889404, now seen corresponding path program 15 times [2021-07-09 18:20:47,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:47,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091603475] [2021-07-09 18:20:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:47,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091603475] [2021-07-09 18:20:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091603475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:47,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482652628] [2021-07-09 18:20:47,967 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 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 [2021-07-09 18:20:47,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:20:47,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:47,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:48,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482652628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:48,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:48,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 18:20:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950397548] [2021-07-09 18:20:48,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:20:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:20:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:48,031 INFO L87 Difference]: Start difference. First operand 3369 states and 11639 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-07-09 18:20:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:48,182 INFO L93 Difference]: Finished difference Result 5144 states and 16955 transitions. [2021-07-09 18:20:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:20:48,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 27 [2021-07-09 18:20:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:48,190 INFO L225 Difference]: With dead ends: 5144 [2021-07-09 18:20:48,190 INFO L226 Difference]: Without dead ends: 5133 [2021-07-09 18:20:48,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-07-09 18:20:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 3459. [2021-07-09 18:20:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 3.462695199537305) internal successors, (11974), 3458 states have internal predecessors, (11974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 11974 transitions. [2021-07-09 18:20:48,251 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 11974 transitions. Word has length 27 [2021-07-09 18:20:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:48,251 INFO L482 AbstractCegarLoop]: Abstraction has 3459 states and 11974 transitions. [2021-07-09 18:20:48,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-07-09 18:20:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 11974 transitions. [2021-07-09 18:20:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:48,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:48,259 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:48,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:48,460 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:48,460 INFO L82 PathProgramCache]: Analyzing trace with hash -479704520, now seen corresponding path program 16 times [2021-07-09 18:20:48,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:48,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118695505] [2021-07-09 18:20:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:48,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:48,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118695505] [2021-07-09 18:20:48,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118695505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:48,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689173594] [2021-07-09 18:20:48,484 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 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 [2021-07-09 18:20:48,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:48,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:48,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:48,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689173594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:48,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:48,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 18:20:48,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727478700] [2021-07-09 18:20:48,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:20:48,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:20:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:48,554 INFO L87 Difference]: Start difference. First operand 3459 states and 11974 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-07-09 18:20:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:48,718 INFO L93 Difference]: Finished difference Result 5400 states and 17684 transitions. [2021-07-09 18:20:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:20:48,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 27 [2021-07-09 18:20:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:48,728 INFO L225 Difference]: With dead ends: 5400 [2021-07-09 18:20:48,729 INFO L226 Difference]: Without dead ends: 5400 [2021-07-09 18:20:48,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:20:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-07-09 18:20:48,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 3354. [2021-07-09 18:20:48,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 3.4446764091858038) internal successors, (11550), 3353 states have internal predecessors, (11550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 11550 transitions. [2021-07-09 18:20:48,822 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 11550 transitions. Word has length 27 [2021-07-09 18:20:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:48,822 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 11550 transitions. [2021-07-09 18:20:48,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2021-07-09 18:20:48,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 11550 transitions. [2021-07-09 18:20:48,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:48,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:48,829 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:49,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:49,044 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash -826283657, now seen corresponding path program 17 times [2021-07-09 18:20:49,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:49,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069868677] [2021-07-09 18:20:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:49,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:49,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069868677] [2021-07-09 18:20:49,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069868677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:49,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424003262] [2021-07-09 18:20:49,071 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 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 [2021-07-09 18:20:49,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:20:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:49,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424003262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:49,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:49,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:20:49,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150711501] [2021-07-09 18:20:49,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:49,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:49,150 INFO L87 Difference]: Start difference. First operand 3354 states and 11550 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) [2021-07-09 18:20:49,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:49,615 INFO L93 Difference]: Finished difference Result 7362 states and 23005 transitions. [2021-07-09 18:20:49,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:20:49,616 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 27 [2021-07-09 18:20:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:49,628 INFO L225 Difference]: With dead ends: 7362 [2021-07-09 18:20:49,628 INFO L226 Difference]: Without dead ends: 7362 [2021-07-09 18:20:49,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:20:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-07-09 18:20:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3368. [2021-07-09 18:20:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.4460944460944463) internal successors, (11603), 3367 states have internal predecessors, (11603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 11603 transitions. [2021-07-09 18:20:49,699 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 11603 transitions. Word has length 27 [2021-07-09 18:20:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:49,699 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 11603 transitions. [2021-07-09 18:20:49,699 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) [2021-07-09 18:20:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 11603 transitions. [2021-07-09 18:20:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:49,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:49,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:49,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:49,904 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1015501955, now seen corresponding path program 18 times [2021-07-09 18:20:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:49,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132637174] [2021-07-09 18:20:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:49,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132637174] [2021-07-09 18:20:49,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132637174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:49,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397464176] [2021-07-09 18:20:49,949 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 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 [2021-07-09 18:20:49,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:20:49,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:49,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:50,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397464176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:50,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:50,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:20:50,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375828144] [2021-07-09 18:20:50,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:50,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:50,029 INFO L87 Difference]: Start difference. First operand 3368 states and 11603 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) [2021-07-09 18:20:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:50,449 INFO L93 Difference]: Finished difference Result 7148 states and 22493 transitions. [2021-07-09 18:20:50,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:20:50,449 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 27 [2021-07-09 18:20:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:50,461 INFO L225 Difference]: With dead ends: 7148 [2021-07-09 18:20:50,461 INFO L226 Difference]: Without dead ends: 7140 [2021-07-09 18:20:50,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:20:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-07-09 18:20:50,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3360. [2021-07-09 18:20:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-07-09 18:20:50,533 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-07-09 18:20:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:50,533 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-07-09 18:20:50,533 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) [2021-07-09 18:20:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-07-09 18:20:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:50,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:50,538 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:50,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:20:50,753 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 374019261, now seen corresponding path program 19 times [2021-07-09 18:20:50,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:50,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743345957] [2021-07-09 18:20:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:50,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:50,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743345957] [2021-07-09 18:20:50,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743345957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:50,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320153610] [2021-07-09 18:20:50,780 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 [2021-07-09 18:20:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:50,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320153610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:50,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:50,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:20:50,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401945532] [2021-07-09 18:20:50,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:50,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:50,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:50,866 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:51,430 INFO L93 Difference]: Finished difference Result 7312 states and 22866 transitions. [2021-07-09 18:20:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:20:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-07-09 18:20:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:51,442 INFO L225 Difference]: With dead ends: 7312 [2021-07-09 18:20:51,442 INFO L226 Difference]: Without dead ends: 7312 [2021-07-09 18:20:51,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:20:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7312 states. [2021-07-09 18:20:51,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7312 to 3366. [2021-07-09 18:20:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.444873699851412) internal successors, (11592), 3365 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 11592 transitions. [2021-07-09 18:20:51,515 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 11592 transitions. Word has length 27 [2021-07-09 18:20:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:51,515 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 11592 transitions. [2021-07-09 18:20:51,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 11592 transitions. [2021-07-09 18:20:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:51,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:51,520 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:51,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:20:51,721 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2138298565, now seen corresponding path program 20 times [2021-07-09 18:20:51,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:51,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874599971] [2021-07-09 18:20:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:51,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:51,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874599971] [2021-07-09 18:20:51,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874599971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:51,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35333955] [2021-07-09 18:20:51,749 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 [2021-07-09 18:20:51,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:51,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:51,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:51,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35333955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:51,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:51,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:20:51,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928728173] [2021-07-09 18:20:51,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:51,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:51,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:51,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:51,830 INFO L87 Difference]: Start difference. First operand 3366 states and 11592 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:52,282 INFO L93 Difference]: Finished difference Result 7159 states and 22507 transitions. [2021-07-09 18:20:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:20:52,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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 27 [2021-07-09 18:20:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:52,295 INFO L225 Difference]: With dead ends: 7159 [2021-07-09 18:20:52,295 INFO L226 Difference]: Without dead ends: 7151 [2021-07-09 18:20:52,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-07-09 18:20:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3360. [2021-07-09 18:20:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.443584400119083) internal successors, (11567), 3359 states have internal predecessors, (11567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 11567 transitions. [2021-07-09 18:20:52,360 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 11567 transitions. Word has length 27 [2021-07-09 18:20:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:52,360 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 11567 transitions. [2021-07-09 18:20:52,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 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) [2021-07-09 18:20:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 11567 transitions. [2021-07-09 18:20:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:52,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:52,366 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:52,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:20:52,572 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1533405914, now seen corresponding path program 21 times [2021-07-09 18:20:52,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:52,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440692351] [2021-07-09 18:20:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:52,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:52,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440692351] [2021-07-09 18:20:52,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440692351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:52,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480929386] [2021-07-09 18:20:52,597 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 [2021-07-09 18:20:52,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:20:52,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:52,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480929386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:52,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:52,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:20:52,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712701582] [2021-07-09 18:20:52,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:20:52,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:52,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:20:52,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:20:52,670 INFO L87 Difference]: Start difference. First operand 3360 states and 11567 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-07-09 18:20:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:52,827 INFO L93 Difference]: Finished difference Result 5123 states and 16923 transitions. [2021-07-09 18:20:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:20:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 27 [2021-07-09 18:20:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:52,836 INFO L225 Difference]: With dead ends: 5123 [2021-07-09 18:20:52,836 INFO L226 Difference]: Without dead ends: 5123 [2021-07-09 18:20:52,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:20:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-07-09 18:20:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4026. [2021-07-09 18:20:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.443726708074534) internal successors, (13861), 4025 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13861 transitions. [2021-07-09 18:20:52,896 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13861 transitions. Word has length 27 [2021-07-09 18:20:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:52,897 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 13861 transitions. [2021-07-09 18:20:52,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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) [2021-07-09 18:20:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13861 transitions. [2021-07-09 18:20:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:52,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:52,902 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:53,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:53,106 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1095030085, now seen corresponding path program 22 times [2021-07-09 18:20:53,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:53,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190322713] [2021-07-09 18:20:53,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:53,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190322713] [2021-07-09 18:20:53,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190322713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:53,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865680178] [2021-07-09 18:20:53,140 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 [2021-07-09 18:20:53,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:53,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:53,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:53,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865680178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:53,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:53,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:20:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582922253] [2021-07-09 18:20:53,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:53,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:53,243 INFO L87 Difference]: Start difference. First operand 4026 states and 13861 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) [2021-07-09 18:20:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:53,776 INFO L93 Difference]: Finished difference Result 7661 states and 24465 transitions. [2021-07-09 18:20:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:20:53,777 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 27 [2021-07-09 18:20:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:53,790 INFO L225 Difference]: With dead ends: 7661 [2021-07-09 18:20:53,790 INFO L226 Difference]: Without dead ends: 7661 [2021-07-09 18:20:53,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:20:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7661 states. [2021-07-09 18:20:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7661 to 4388. [2021-07-09 18:20:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 3.4410759060861635) internal successors, (15096), 4387 states have internal predecessors, (15096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 15096 transitions. [2021-07-09 18:20:53,875 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 15096 transitions. Word has length 27 [2021-07-09 18:20:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:53,875 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 15096 transitions. [2021-07-09 18:20:53,875 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) [2021-07-09 18:20:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 15096 transitions. [2021-07-09 18:20:53,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:53,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:53,881 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:54,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:20:54,091 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:54,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:54,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1284248383, now seen corresponding path program 23 times [2021-07-09 18:20:54,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:54,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101462353] [2021-07-09 18:20:54,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:54,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:54,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101462353] [2021-07-09 18:20:54,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101462353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:54,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380173938] [2021-07-09 18:20:54,118 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 [2021-07-09 18:20:54,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:20:54,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:54,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:54,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380173938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:54,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:54,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:20:54,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821120074] [2021-07-09 18:20:54,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:54,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:54,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:54,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:54,218 INFO L87 Difference]: Start difference. First operand 4388 states and 15096 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) [2021-07-09 18:20:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:54,674 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2021-07-09 18:20:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:20:54,675 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 27 [2021-07-09 18:20:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:54,687 INFO L225 Difference]: With dead ends: 7294 [2021-07-09 18:20:54,687 INFO L226 Difference]: Without dead ends: 7286 [2021-07-09 18:20:54,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:20:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7286 states. [2021-07-09 18:20:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7286 to 4380. [2021-07-09 18:20:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 3.4405115323133137) internal successors, (15066), 4379 states have internal predecessors, (15066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 15066 transitions. [2021-07-09 18:20:54,787 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 15066 transitions. Word has length 27 [2021-07-09 18:20:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:54,787 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 15066 transitions. [2021-07-09 18:20:54,787 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) [2021-07-09 18:20:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 15066 transitions. [2021-07-09 18:20:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:54,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:54,793 INFO L508 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, 1, 1, 1] [2021-07-09 18:20:54,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:20:54,993 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:54,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:54,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1799080439, now seen corresponding path program 9 times [2021-07-09 18:20:54,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:54,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439718215] [2021-07-09 18:20:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:55,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439718215] [2021-07-09 18:20:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439718215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400832831] [2021-07-09 18:20:55,028 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 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 [2021-07-09 18:20:55,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:20:55,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:20:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:55,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400832831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:55,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:55,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:20:55,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217193217] [2021-07-09 18:20:55,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:55,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:55,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:55,095 INFO L87 Difference]: Start difference. First operand 4380 states and 15066 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) [2021-07-09 18:20:55,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:55,277 INFO L93 Difference]: Finished difference Result 5160 states and 17337 transitions. [2021-07-09 18:20:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:20:55,278 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 27 [2021-07-09 18:20:55,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:55,286 INFO L225 Difference]: With dead ends: 5160 [2021-07-09 18:20:55,286 INFO L226 Difference]: Without dead ends: 5160 [2021-07-09 18:20:55,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:20:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-07-09 18:20:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4419. [2021-07-09 18:20:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4419 states, 4418 states have (on average 3.438886373924853) internal successors, (15193), 4418 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:55,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4419 states to 4419 states and 15193 transitions. [2021-07-09 18:20:55,349 INFO L78 Accepts]: Start accepts. Automaton has 4419 states and 15193 transitions. Word has length 27 [2021-07-09 18:20:55,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:55,349 INFO L482 AbstractCegarLoop]: Abstraction has 4419 states and 15193 transitions. [2021-07-09 18:20:55,350 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) [2021-07-09 18:20:55,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4419 states and 15193 transitions. [2021-07-09 18:20:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:55,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:55,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:55,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:55,556 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash -640866123, now seen corresponding path program 24 times [2021-07-09 18:20:55,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:55,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040259699] [2021-07-09 18:20:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:55,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040259699] [2021-07-09 18:20:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040259699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538223475] [2021-07-09 18:20:55,590 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 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 [2021-07-09 18:20:55,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:20:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:55,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:55,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538223475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:55,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:55,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:20:55,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773272824] [2021-07-09 18:20:55,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:20:55,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:55,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:20:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:20:55,663 INFO L87 Difference]: Start difference. First operand 4419 states and 15193 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) [2021-07-09 18:20:56,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:56,050 INFO L93 Difference]: Finished difference Result 7167 states and 23253 transitions. [2021-07-09 18:20:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:20:56,051 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 27 [2021-07-09 18:20:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:56,062 INFO L225 Difference]: With dead ends: 7167 [2021-07-09 18:20:56,062 INFO L226 Difference]: Without dead ends: 7135 [2021-07-09 18:20:56,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:20:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2021-07-09 18:20:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 4447. [2021-07-09 18:20:56,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4446 states have (on average 3.435672514619883) internal successors, (15275), 4446 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 15275 transitions. [2021-07-09 18:20:56,142 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 15275 transitions. Word has length 27 [2021-07-09 18:20:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:56,142 INFO L482 AbstractCegarLoop]: Abstraction has 4447 states and 15275 transitions. [2021-07-09 18:20:56,142 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) [2021-07-09 18:20:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 15275 transitions. [2021-07-09 18:20:56,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:56,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:56,148 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:56,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 18:20:56,349 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash -328510151, now seen corresponding path program 25 times [2021-07-09 18:20:56,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:56,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463293593] [2021-07-09 18:20:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:56,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:56,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463293593] [2021-07-09 18:20:56,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463293593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:56,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114764536] [2021-07-09 18:20:56,376 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 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 [2021-07-09 18:20:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:56,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114764536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:56,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:56,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:20:56,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775503218] [2021-07-09 18:20:56,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:56,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:56,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:56,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:56,468 INFO L87 Difference]: Start difference. First operand 4447 states and 15275 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-07-09 18:20:57,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:57,011 INFO L93 Difference]: Finished difference Result 7634 states and 24450 transitions. [2021-07-09 18:20:57,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:20:57,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-07-09 18:20:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:57,025 INFO L225 Difference]: With dead ends: 7634 [2021-07-09 18:20:57,025 INFO L226 Difference]: Without dead ends: 7634 [2021-07-09 18:20:57,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:20:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2021-07-09 18:20:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 4681. [2021-07-09 18:20:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 3.4264957264957263) internal successors, (16036), 4680 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 16036 transitions. [2021-07-09 18:20:57,134 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 16036 transitions. Word has length 27 [2021-07-09 18:20:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 16036 transitions. [2021-07-09 18:20:57,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-07-09 18:20:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 16036 transitions. [2021-07-09 18:20:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:57,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:57,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:57,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:57,341 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:57,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:57,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1454139319, now seen corresponding path program 26 times [2021-07-09 18:20:57,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:57,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705889150] [2021-07-09 18:20:57,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:57,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705889150] [2021-07-09 18:20:57,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705889150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:57,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121885299] [2021-07-09 18:20:57,372 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 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 [2021-07-09 18:20:57,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:57,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:57,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121885299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:57,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:57,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:20:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608054467] [2021-07-09 18:20:57,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:20:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:20:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:20:57,475 INFO L87 Difference]: Start difference. First operand 4681 states and 16036 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-07-09 18:20:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:57,946 INFO L93 Difference]: Finished difference Result 7391 states and 23828 transitions. [2021-07-09 18:20:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:20:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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 27 [2021-07-09 18:20:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:57,959 INFO L225 Difference]: With dead ends: 7391 [2021-07-09 18:20:57,959 INFO L226 Difference]: Without dead ends: 7383 [2021-07-09 18:20:57,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:20:57,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-07-09 18:20:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4675. [2021-07-09 18:20:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 3.4251176722293537) internal successors, (16009), 4674 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 16009 transitions. [2021-07-09 18:20:58,047 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 16009 transitions. Word has length 27 [2021-07-09 18:20:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:58,047 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 16009 transitions. [2021-07-09 18:20:58,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-07-09 18:20:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 16009 transitions. [2021-07-09 18:20:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:58,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:58,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:58,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:20:58,265 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 609167867, now seen corresponding path program 27 times [2021-07-09 18:20:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:58,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311191717] [2021-07-09 18:20:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:58,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:58,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311191717] [2021-07-09 18:20:58,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311191717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:58,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163673828] [2021-07-09 18:20:58,292 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 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 [2021-07-09 18:20:58,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:20:58,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:58,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:58,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163673828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:58,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:58,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:20:58,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534527890] [2021-07-09 18:20:58,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:58,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:58,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:58,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:58,375 INFO L87 Difference]: Start difference. First operand 4675 states and 16009 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:20:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:58,819 INFO L93 Difference]: Finished difference Result 7057 states and 23013 transitions. [2021-07-09 18:20:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:20:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-07-09 18:20:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:58,831 INFO L225 Difference]: With dead ends: 7057 [2021-07-09 18:20:58,832 INFO L226 Difference]: Without dead ends: 7025 [2021-07-09 18:20:58,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:20:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7025 states. [2021-07-09 18:20:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7025 to 4719. [2021-07-09 18:20:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.42030521407376) internal successors, (16137), 4718 states have internal predecessors, (16137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16137 transitions. [2021-07-09 18:20:58,913 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16137 transitions. Word has length 27 [2021-07-09 18:20:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:58,913 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16137 transitions. [2021-07-09 18:20:58,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:20:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16137 transitions. [2021-07-09 18:20:58,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:58,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:58,919 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:59,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:20:59,120 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:59,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:59,120 INFO L82 PathProgramCache]: Analyzing trace with hash 273764453, now seen corresponding path program 28 times [2021-07-09 18:20:59,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:59,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364760517] [2021-07-09 18:20:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:59,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:59,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364760517] [2021-07-09 18:20:59,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364760517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:59,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628379564] [2021-07-09 18:20:59,153 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:20:59,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:59,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628379564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:59,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:59,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:20:59,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378164299] [2021-07-09 18:20:59,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:20:59,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:20:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:20:59,238 INFO L87 Difference]: Start difference. First operand 4719 states and 16137 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:20:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:59,573 INFO L93 Difference]: Finished difference Result 6384 states and 21138 transitions. [2021-07-09 18:20:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:20:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-07-09 18:20:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:59,584 INFO L225 Difference]: With dead ends: 6384 [2021-07-09 18:20:59,584 INFO L226 Difference]: Without dead ends: 6384 [2021-07-09 18:20:59,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:20:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-07-09 18:20:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 4849. [2021-07-09 18:20:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4848 states have (on average 3.4096534653465347) internal successors, (16530), 4848 states have internal predecessors, (16530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 16530 transitions. [2021-07-09 18:20:59,660 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 16530 transitions. Word has length 27 [2021-07-09 18:20:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:59,660 INFO L482 AbstractCegarLoop]: Abstraction has 4849 states and 16530 transitions. [2021-07-09 18:20:59,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-07-09 18:20:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 16530 transitions. [2021-07-09 18:20:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:20:59,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:59,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:59,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:59,881 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:59,881 INFO L82 PathProgramCache]: Analyzing trace with hash 327227152, now seen corresponding path program 15 times [2021-07-09 18:20:59,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016153445] [2021-07-09 18:20:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:59,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:59,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016153445] [2021-07-09 18:20:59,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016153445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:59,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254361659] [2021-07-09 18:20:59,912 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 [2021-07-09 18:20:59,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:20:59,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:59,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:20:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:59,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254361659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:59,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:59,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:20:59,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719871000] [2021-07-09 18:20:59,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:20:59,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:59,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:20:59,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:20:59,987 INFO L87 Difference]: Start difference. First operand 4849 states and 16530 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-07-09 18:21:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:00,360 INFO L93 Difference]: Finished difference Result 6692 states and 22004 transitions. [2021-07-09 18:21:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:21:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-07-09 18:21:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:00,374 INFO L225 Difference]: With dead ends: 6692 [2021-07-09 18:21:00,374 INFO L226 Difference]: Without dead ends: 6692 [2021-07-09 18:21:00,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:21:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6692 states. [2021-07-09 18:21:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6692 to 4967. [2021-07-09 18:21:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.3987112364075713) internal successors, (16878), 4966 states have internal predecessors, (16878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 16878 transitions. [2021-07-09 18:21:00,455 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 16878 transitions. Word has length 27 [2021-07-09 18:21:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:00,455 INFO L482 AbstractCegarLoop]: Abstraction has 4967 states and 16878 transitions. [2021-07-09 18:21:00,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-07-09 18:21:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 16878 transitions. [2021-07-09 18:21:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:21:00,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:00,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:21:00,677 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 921828852, now seen corresponding path program 16 times [2021-07-09 18:21:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:00,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232182644] [2021-07-09 18:21:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:00,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:00,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232182644] [2021-07-09 18:21:00,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232182644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:00,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194604479] [2021-07-09 18:21:00,704 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 [2021-07-09 18:21:00,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:21:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194604479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:00,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:00,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:21:00,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106095864] [2021-07-09 18:21:00,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:21:00,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:21:00,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:21:00,774 INFO L87 Difference]: Start difference. First operand 4967 states and 16878 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-07-09 18:21:01,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:01,080 INFO L93 Difference]: Finished difference Result 6568 states and 21695 transitions. [2021-07-09 18:21:01,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:21:01,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 27 [2021-07-09 18:21:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:01,097 INFO L225 Difference]: With dead ends: 6568 [2021-07-09 18:21:01,097 INFO L226 Difference]: Without dead ends: 6552 [2021-07-09 18:21:01,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:21:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-07-09 18:21:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 5075. [2021-07-09 18:21:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.3866771777690183) internal successors, (17184), 5074 states have internal predecessors, (17184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 17184 transitions. [2021-07-09 18:21:01,191 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 17184 transitions. Word has length 27 [2021-07-09 18:21:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:01,191 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 17184 transitions. [2021-07-09 18:21:01,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-07-09 18:21:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 17184 transitions. [2021-07-09 18:21:01,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:21:01,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:01,198 INFO L508 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, 1, 1, 1] [2021-07-09 18:21:01,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:01,399 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:01,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1636343253, now seen corresponding path program 10 times [2021-07-09 18:21:01,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:01,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594938125] [2021-07-09 18:21:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:01,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:01,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594938125] [2021-07-09 18:21:01,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594938125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:01,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407962550] [2021-07-09 18:21:01,426 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 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 [2021-07-09 18:21:01,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:01,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:01,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:21:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:01,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407962550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:01,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:01,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:21:01,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911977623] [2021-07-09 18:21:01,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:21:01,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:01,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:21:01,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:21:01,501 INFO L87 Difference]: Start difference. First operand 5075 states and 17184 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) [2021-07-09 18:21:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:01,743 INFO L93 Difference]: Finished difference Result 5593 states and 18688 transitions. [2021-07-09 18:21:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:21:01,743 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 27 [2021-07-09 18:21:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:01,753 INFO L225 Difference]: With dead ends: 5593 [2021-07-09 18:21:01,753 INFO L226 Difference]: Without dead ends: 5593 [2021-07-09 18:21:01,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:21:01,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-07-09 18:21:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4995. [2021-07-09 18:21:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4994 states have (on average 3.383660392470965) internal successors, (16898), 4994 states have internal predecessors, (16898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 16898 transitions. [2021-07-09 18:21:01,831 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 16898 transitions. Word has length 27 [2021-07-09 18:21:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:01,831 INFO L482 AbstractCegarLoop]: Abstraction has 4995 states and 16898 transitions. [2021-07-09 18:21:01,831 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) [2021-07-09 18:21:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 16898 transitions. [2021-07-09 18:21:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:01,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:01,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:02,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:21:02,039 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:02,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1236304047, now seen corresponding path program 29 times [2021-07-09 18:21:02,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:02,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516283562] [2021-07-09 18:21:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:02,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516283562] [2021-07-09 18:21:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516283562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:02,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045110080] [2021-07-09 18:21:02,158 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 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 [2021-07-09 18:21:02,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:21:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:02,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:21:02,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:02,328 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 19 treesize of output 11 [2021-07-09 18:21:02,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:02,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:02,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:02,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:21:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:02,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045110080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:02,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:02,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:21:02,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712198737] [2021-07-09 18:21:02,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:21:02,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:02,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:21:02,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:21:02,357 INFO L87 Difference]: Start difference. First operand 4995 states and 16898 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:21:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:02,603 INFO L93 Difference]: Finished difference Result 5811 states and 19365 transitions. [2021-07-09 18:21:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:21:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 30 [2021-07-09 18:21:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:02,615 INFO L225 Difference]: With dead ends: 5811 [2021-07-09 18:21:02,615 INFO L226 Difference]: Without dead ends: 5742 [2021-07-09 18:21:02,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:21:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-07-09 18:21:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 5187. [2021-07-09 18:21:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 3.3814114924797534) internal successors, (17536), 5186 states have internal predecessors, (17536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:02,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 17536 transitions. [2021-07-09 18:21:02,701 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 17536 transitions. Word has length 30 [2021-07-09 18:21:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:02,701 INFO L482 AbstractCegarLoop]: Abstraction has 5187 states and 17536 transitions. [2021-07-09 18:21:02,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:21:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 17536 transitions. [2021-07-09 18:21:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:02,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:02,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:02,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:21:02,910 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash 745415110, now seen corresponding path program 11 times [2021-07-09 18:21:02,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:02,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811084987] [2021-07-09 18:21:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:03,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:03,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811084987] [2021-07-09 18:21:03,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811084987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:03,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921722077] [2021-07-09 18:21:03,311 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 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 [2021-07-09 18:21:03,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:21:03,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:21:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:03,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:03,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:03,655 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:21:03,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:03,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:03,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:03,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:21:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921722077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:03,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:03,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:21:03,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449293763] [2021-07-09 18:21:03,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:21:03,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:21:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:21:03,687 INFO L87 Difference]: Start difference. First operand 5187 states and 17536 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:04,992 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:21:05,861 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-07-09 18:21:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:06,744 INFO L93 Difference]: Finished difference Result 8307 states and 27178 transitions. [2021-07-09 18:21:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:21:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:21:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:06,760 INFO L225 Difference]: With dead ends: 8307 [2021-07-09 18:21:06,760 INFO L226 Difference]: Without dead ends: 8281 [2021-07-09 18:21:06,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2644.4ms TimeCoverageRelationStatistics Valid=416, Invalid=3006, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:21:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8281 states. [2021-07-09 18:21:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8281 to 5254. [2021-07-09 18:21:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 3.379211878926328) internal successors, (17751), 5253 states have internal predecessors, (17751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 17751 transitions. [2021-07-09 18:21:06,850 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 17751 transitions. Word has length 30 [2021-07-09 18:21:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:06,850 INFO L482 AbstractCegarLoop]: Abstraction has 5254 states and 17751 transitions. [2021-07-09 18:21:06,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 17751 transitions. [2021-07-09 18:21:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:06,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:06,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:07,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:07,058 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:07,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1233935798, now seen corresponding path program 12 times [2021-07-09 18:21:07,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:07,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726290302] [2021-07-09 18:21:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:07,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726290302] [2021-07-09 18:21:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726290302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259166258] [2021-07-09 18:21:07,239 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 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 [2021-07-09 18:21:07,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:21:07,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:07,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:21:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:07,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:07,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:21:07,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:07,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:07,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:07,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-07-09 18:21:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259166258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:07,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:07,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-07-09 18:21:07,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045621929] [2021-07-09 18:21:07,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:21:07,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:07,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:21:07,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:21:07,758 INFO L87 Difference]: Start difference. First operand 5254 states and 17751 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:10,532 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:21:11,660 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-07-09 18:21:11,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:11,667 INFO L93 Difference]: Finished difference Result 9505 states and 30456 transitions. [2021-07-09 18:21:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:21:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:21:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:11,684 INFO L225 Difference]: With dead ends: 9505 [2021-07-09 18:21:11,684 INFO L226 Difference]: Without dead ends: 9445 [2021-07-09 18:21:11,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 3116.2ms TimeCoverageRelationStatistics Valid=674, Invalid=5332, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:21:11,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2021-07-09 18:21:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 5277. [2021-07-09 18:21:11,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 5276 states have (on average 3.3788855193328278) internal successors, (17827), 5276 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 17827 transitions. [2021-07-09 18:21:11,781 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 17827 transitions. Word has length 30 [2021-07-09 18:21:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:11,781 INFO L482 AbstractCegarLoop]: Abstraction has 5277 states and 17827 transitions. [2021-07-09 18:21:11,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 17827 transitions. [2021-07-09 18:21:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:11,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:11,788 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:11,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:11,988 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1698612030, now seen corresponding path program 13 times [2021-07-09 18:21:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:11,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874095104] [2021-07-09 18:21:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:12,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874095104] [2021-07-09 18:21:12,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874095104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924753340] [2021-07-09 18:21:12,237 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 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 [2021-07-09 18:21:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:21:12,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:12,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:12,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:21:12,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:12,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:12,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:12,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:21:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:12,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924753340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:12,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:12,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:21:12,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288169993] [2021-07-09 18:21:12,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:21:12,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:21:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:21:12,494 INFO L87 Difference]: Start difference. First operand 5277 states and 17827 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:21:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:14,304 INFO L93 Difference]: Finished difference Result 6564 states and 21312 transitions. [2021-07-09 18:21:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:21:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:21:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:14,315 INFO L225 Difference]: With dead ends: 6564 [2021-07-09 18:21:14,316 INFO L226 Difference]: Without dead ends: 6534 [2021-07-09 18:21:14,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1501.0ms TimeCoverageRelationStatistics Valid=385, Invalid=2371, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:21:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6534 states. [2021-07-09 18:21:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6534 to 5285. [2021-07-09 18:21:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 3.3783118849356546) internal successors, (17851), 5284 states have internal predecessors, (17851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 17851 transitions. [2021-07-09 18:21:14,392 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 17851 transitions. Word has length 30 [2021-07-09 18:21:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:14,392 INFO L482 AbstractCegarLoop]: Abstraction has 5285 states and 17851 transitions. [2021-07-09 18:21:14,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:21:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 17851 transitions. [2021-07-09 18:21:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:14,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:14,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:14,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:21:14,600 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash -721957958, now seen corresponding path program 14 times [2021-07-09 18:21:14,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:14,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858365166] [2021-07-09 18:21:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:14,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:14,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858365166] [2021-07-09 18:21:14,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858365166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:14,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696612936] [2021-07-09 18:21:14,890 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 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 [2021-07-09 18:21:14,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:21:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:14,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:21:14,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:15,050 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 19 treesize of output 19 [2021-07-09 18:21:15,052 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:21:15,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:15,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:15,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:21:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:15,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696612936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:15,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:15,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:21:15,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123938298] [2021-07-09 18:21:15,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:21:15,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:15,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:21:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:21:15,119 INFO L87 Difference]: Start difference. First operand 5285 states and 17851 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-07-09 18:21:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:18,178 INFO L93 Difference]: Finished difference Result 6989 states and 22642 transitions. [2021-07-09 18:21:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:21:18,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-07-09 18:21:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:18,190 INFO L225 Difference]: With dead ends: 6989 [2021-07-09 18:21:18,190 INFO L226 Difference]: Without dead ends: 6943 [2021-07-09 18:21:18,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2383.4ms TimeCoverageRelationStatistics Valid=557, Invalid=3999, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:21:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6943 states. [2021-07-09 18:21:18,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6943 to 5338. [2021-07-09 18:21:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.3814877271875585) internal successors, (18047), 5337 states have internal predecessors, (18047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18047 transitions. [2021-07-09 18:21:18,279 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18047 transitions. Word has length 30 [2021-07-09 18:21:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:18,279 INFO L482 AbstractCegarLoop]: Abstraction has 5338 states and 18047 transitions. [2021-07-09 18:21:18,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-07-09 18:21:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18047 transitions. [2021-07-09 18:21:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:18,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:18,286 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:18,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:18,487 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1665366353, now seen corresponding path program 17 times [2021-07-09 18:21:18,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:18,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397966053] [2021-07-09 18:21:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:18,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397966053] [2021-07-09 18:21:18,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397966053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637467415] [2021-07-09 18:21:18,938 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 [2021-07-09 18:21:18,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:21:18,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:21:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:19,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:19,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:19,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:19,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:19,231 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 21 treesize of output 11 [2021-07-09 18:21:19,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:19,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:19,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:19,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:21:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637467415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:19,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:19,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:21:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255387600] [2021-07-09 18:21:19,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:21:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:19,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:21:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:21:19,256 INFO L87 Difference]: Start difference. First operand 5338 states and 18047 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:21,373 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 18:21:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:22,924 INFO L93 Difference]: Finished difference Result 7096 states and 23312 transitions. [2021-07-09 18:21:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:21:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:21:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:22,936 INFO L225 Difference]: With dead ends: 7096 [2021-07-09 18:21:22,936 INFO L226 Difference]: Without dead ends: 7070 [2021-07-09 18:21:22,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 3141.0ms TimeCoverageRelationStatistics Valid=537, Invalid=4293, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:21:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7070 states. [2021-07-09 18:21:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7070 to 5425. [2021-07-09 18:21:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 3.3737094395280236) internal successors, (18299), 5424 states have internal predecessors, (18299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 18299 transitions. [2021-07-09 18:21:23,015 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 18299 transitions. Word has length 30 [2021-07-09 18:21:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:23,015 INFO L482 AbstractCegarLoop]: Abstraction has 5425 states and 18299 transitions. [2021-07-09 18:21:23,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 18299 transitions. [2021-07-09 18:21:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:23,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:23,022 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:23,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:23,222 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1512137484, now seen corresponding path program 15 times [2021-07-09 18:21:23,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:23,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549295958] [2021-07-09 18:21:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:23,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549295958] [2021-07-09 18:21:23,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549295958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492625709] [2021-07-09 18:21:23,508 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 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 [2021-07-09 18:21:23,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:21:23,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:23,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:21:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:23,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:21:23,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:23,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:23,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:23,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-09 18:21:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:23,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492625709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:23,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:23,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:21:23,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104369076] [2021-07-09 18:21:23,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:21:23,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:21:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:21:23,797 INFO L87 Difference]: Start difference. First operand 5425 states and 18299 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:21:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:25,460 INFO L93 Difference]: Finished difference Result 6660 states and 21646 transitions. [2021-07-09 18:21:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:21:25,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:21:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:25,472 INFO L225 Difference]: With dead ends: 6660 [2021-07-09 18:21:25,472 INFO L226 Difference]: Without dead ends: 6630 [2021-07-09 18:21:25,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1531.7ms TimeCoverageRelationStatistics Valid=349, Invalid=2101, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:21:25,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-07-09 18:21:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 5428. [2021-07-09 18:21:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 3.3738713838216325) internal successors, (18310), 5427 states have internal predecessors, (18310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 18310 transitions. [2021-07-09 18:21:25,552 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 18310 transitions. Word has length 30 [2021-07-09 18:21:25,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:25,552 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 18310 transitions. [2021-07-09 18:21:25,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:21:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 18310 transitions. [2021-07-09 18:21:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:25,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:25,560 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:25,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-09 18:21:25,760 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1854264556, now seen corresponding path program 16 times [2021-07-09 18:21:25,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:25,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755398022] [2021-07-09 18:21:25,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:26,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755398022] [2021-07-09 18:21:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755398022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982225025] [2021-07-09 18:21:26,019 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 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 [2021-07-09 18:21:26,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:26,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:26,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:21:26,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:26,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:21:26,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:26,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:26,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:26,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:21:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:26,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982225025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:26,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:26,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:21:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956476248] [2021-07-09 18:21:26,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:21:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:21:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:21:26,264 INFO L87 Difference]: Start difference. First operand 5428 states and 18310 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:21:28,136 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-09 18:21:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:28,520 INFO L93 Difference]: Finished difference Result 6861 states and 22152 transitions. [2021-07-09 18:21:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:21:28,521 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-07-09 18:21:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:28,532 INFO L225 Difference]: With dead ends: 6861 [2021-07-09 18:21:28,532 INFO L226 Difference]: Without dead ends: 6831 [2021-07-09 18:21:28,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1853.1ms TimeCoverageRelationStatistics Valid=467, Invalid=2839, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:21:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6831 states. [2021-07-09 18:21:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6831 to 5431. [2021-07-09 18:21:28,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5431 states, 5430 states have (on average 3.3740331491712707) internal successors, (18321), 5430 states have internal predecessors, (18321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5431 states to 5431 states and 18321 transitions. [2021-07-09 18:21:28,614 INFO L78 Accepts]: Start accepts. Automaton has 5431 states and 18321 transitions. Word has length 30 [2021-07-09 18:21:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 5431 states and 18321 transitions. [2021-07-09 18:21:28,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:21:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 5431 states and 18321 transitions. [2021-07-09 18:21:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:28,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:28,621 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:28,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:28,821 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 822848258, now seen corresponding path program 17 times [2021-07-09 18:21:28,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:28,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852680269] [2021-07-09 18:21:28,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:29,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:29,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852680269] [2021-07-09 18:21:29,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852680269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540263713] [2021-07-09 18:21:29,092 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 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 [2021-07-09 18:21:29,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:21:29,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:29,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:21:29,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:29,292 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-07-09 18:21:29,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:21:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:29,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540263713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:29,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:29,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-07-09 18:21:29,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574809929] [2021-07-09 18:21:29,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:21:29,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:21:29,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:21:29,318 INFO L87 Difference]: Start difference. First operand 5431 states and 18321 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-07-09 18:21:30,387 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-09 18:21:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:31,629 INFO L93 Difference]: Finished difference Result 6718 states and 21814 transitions. [2021-07-09 18:21:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:21:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-07-09 18:21:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:31,641 INFO L225 Difference]: With dead ends: 6718 [2021-07-09 18:21:31,641 INFO L226 Difference]: Without dead ends: 6688 [2021-07-09 18:21:31,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2008.4ms TimeCoverageRelationStatistics Valid=430, Invalid=2762, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:21:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-07-09 18:21:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5426. [2021-07-09 18:21:31,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 5425 states have (on average 3.3741935483870966) internal successors, (18305), 5425 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 18305 transitions. [2021-07-09 18:21:31,723 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 18305 transitions. Word has length 30 [2021-07-09 18:21:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:31,723 INFO L482 AbstractCegarLoop]: Abstraction has 5426 states and 18305 transitions. [2021-07-09 18:21:31,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-07-09 18:21:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 18305 transitions. [2021-07-09 18:21:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:31,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:31,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:31,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:31,931 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:31,931 INFO L82 PathProgramCache]: Analyzing trace with hash -727723502, now seen corresponding path program 18 times [2021-07-09 18:21:31,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:31,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034209759] [2021-07-09 18:21:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:32,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:32,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034209759] [2021-07-09 18:21:32,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034209759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:32,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660568499] [2021-07-09 18:21:32,099 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 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 [2021-07-09 18:21:32,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:21:32,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:21:32,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:32,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:32,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:21:32,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:32,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:32,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:32,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-07-09 18:21:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:32,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660568499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:32,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:32,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:21:32,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573600578] [2021-07-09 18:21:32,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:21:32,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:21:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:21:32,445 INFO L87 Difference]: Start difference. First operand 5426 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:34,538 INFO L93 Difference]: Finished difference Result 9647 states and 31226 transitions. [2021-07-09 18:21:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:21:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:21:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:34,559 INFO L225 Difference]: With dead ends: 9647 [2021-07-09 18:21:34,559 INFO L226 Difference]: Without dead ends: 9632 [2021-07-09 18:21:34,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1424.4ms TimeCoverageRelationStatistics Valid=445, Invalid=3337, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:21:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-07-09 18:21:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 5430. [2021-07-09 18:21:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5430 states, 5429 states have (on average 3.375391416467121) internal successors, (18325), 5429 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5430 states to 5430 states and 18325 transitions. [2021-07-09 18:21:34,680 INFO L78 Accepts]: Start accepts. Automaton has 5430 states and 18325 transitions. Word has length 30 [2021-07-09 18:21:34,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:34,680 INFO L482 AbstractCegarLoop]: Abstraction has 5430 states and 18325 transitions. [2021-07-09 18:21:34,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5430 states and 18325 transitions. [2021-07-09 18:21:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:34,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:34,688 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:34,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-09 18:21:34,889 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1710814064, now seen corresponding path program 19 times [2021-07-09 18:21:34,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:34,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345770001] [2021-07-09 18:21:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:35,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:35,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345770001] [2021-07-09 18:21:35,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345770001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:35,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841372360] [2021-07-09 18:21:35,095 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 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 [2021-07-09 18:21:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:21:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:35,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:21:35,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:35,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:35,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:35,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:21:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:35,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841372360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:35,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:35,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:21:35,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703133316] [2021-07-09 18:21:35,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:21:35,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:21:35,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:21:35,372 INFO L87 Difference]: Start difference. First operand 5430 states and 18325 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:38,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:38,476 INFO L93 Difference]: Finished difference Result 9941 states and 32572 transitions. [2021-07-09 18:21:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:21:38,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:21:38,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:38,497 INFO L225 Difference]: With dead ends: 9941 [2021-07-09 18:21:38,497 INFO L226 Difference]: Without dead ends: 9926 [2021-07-09 18:21:38,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1804 ImplicationChecksByTransitivity, 2549.9ms TimeCoverageRelationStatistics Valid=728, Invalid=5124, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:21:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9926 states. [2021-07-09 18:21:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9926 to 5432. [2021-07-09 18:21:38,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5432 states, 5431 states have (on average 3.3758055606702264) internal successors, (18334), 5431 states have internal predecessors, (18334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5432 states to 5432 states and 18334 transitions. [2021-07-09 18:21:38,612 INFO L78 Accepts]: Start accepts. Automaton has 5432 states and 18334 transitions. Word has length 30 [2021-07-09 18:21:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:38,612 INFO L482 AbstractCegarLoop]: Abstraction has 5432 states and 18334 transitions. [2021-07-09 18:21:38,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 5432 states and 18334 transitions. [2021-07-09 18:21:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:38,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:38,620 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:38,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:38,821 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash -811045396, now seen corresponding path program 20 times [2021-07-09 18:21:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:38,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44130089] [2021-07-09 18:21:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:38,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:38,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44130089] [2021-07-09 18:21:38,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44130089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:38,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755069872] [2021-07-09 18:21:38,996 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 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 [2021-07-09 18:21:39,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:21:39,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:39,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:21:39,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:39,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:39,179 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 19 treesize of output 19 [2021-07-09 18:21:39,181 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:21:39,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:39,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:39,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:21:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:39,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755069872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:39,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:39,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:21:39,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963551520] [2021-07-09 18:21:39,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:21:39,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:21:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:21:39,270 INFO L87 Difference]: Start difference. First operand 5432 states and 18334 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:43,047 INFO L93 Difference]: Finished difference Result 11162 states and 36367 transitions. [2021-07-09 18:21:43,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:21:43,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:21:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:43,068 INFO L225 Difference]: With dead ends: 11162 [2021-07-09 18:21:43,068 INFO L226 Difference]: Without dead ends: 11122 [2021-07-09 18:21:43,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2827.4ms TimeCoverageRelationStatistics Valid=893, Invalid=6247, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:21:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-07-09 18:21:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 5474. [2021-07-09 18:21:43,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.379499360496985) internal successors, (18496), 5473 states have internal predecessors, (18496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18496 transitions. [2021-07-09 18:21:43,250 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18496 transitions. Word has length 30 [2021-07-09 18:21:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:43,250 INFO L482 AbstractCegarLoop]: Abstraction has 5474 states and 18496 transitions. [2021-07-09 18:21:43,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18496 transitions. [2021-07-09 18:21:43,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:43,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:43,257 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:43,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 18:21:43,460 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:43,460 INFO L82 PathProgramCache]: Analyzing trace with hash -871815986, now seen corresponding path program 21 times [2021-07-09 18:21:43,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:43,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687493194] [2021-07-09 18:21:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:43,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:43,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687493194] [2021-07-09 18:21:43,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687493194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:43,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380322773] [2021-07-09 18:21:43,784 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 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 [2021-07-09 18:21:43,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:21:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:21:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:43,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:43,939 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 19 treesize of output 27 [2021-07-09 18:21:43,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:43,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:43,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:43,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-07-09 18:21:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380322773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:44,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:44,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 18:21:44,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68722842] [2021-07-09 18:21:44,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:21:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:21:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:21:44,162 INFO L87 Difference]: Start difference. First operand 5474 states and 18496 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:21:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:46,974 INFO L93 Difference]: Finished difference Result 7786 states and 25626 transitions. [2021-07-09 18:21:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:21:46,974 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:21:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:46,989 INFO L225 Difference]: With dead ends: 7786 [2021-07-09 18:21:46,989 INFO L226 Difference]: Without dead ends: 7726 [2021-07-09 18:21:46,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2416.4ms TimeCoverageRelationStatistics Valid=415, Invalid=2665, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:21:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-07-09 18:21:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5478. [2021-07-09 18:21:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 3.3795873653459925) internal successors, (18510), 5477 states have internal predecessors, (18510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 18510 transitions. [2021-07-09 18:21:47,090 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 18510 transitions. Word has length 30 [2021-07-09 18:21:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:47,090 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 18510 transitions. [2021-07-09 18:21:47,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:21:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 18510 transitions. [2021-07-09 18:21:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:47,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:47,097 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:47,298 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash -462088070, now seen corresponding path program 22 times [2021-07-09 18:21:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:47,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300390548] [2021-07-09 18:21:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:47,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:47,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300390548] [2021-07-09 18:21:47,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300390548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:47,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920180673] [2021-07-09 18:21:47,604 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 [2021-07-09 18:21:47,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:47,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:21:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:47,807 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 19 treesize of output 11 [2021-07-09 18:21:47,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:47,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:47,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:47,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:21:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:47,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920180673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:47,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:47,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:21:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679884573] [2021-07-09 18:21:47,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:21:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:21:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:21:47,834 INFO L87 Difference]: Start difference. First operand 5478 states and 18510 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:21:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:50,304 INFO L93 Difference]: Finished difference Result 7437 states and 24428 transitions. [2021-07-09 18:21:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:21:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-07-09 18:21:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:50,317 INFO L225 Difference]: With dead ends: 7437 [2021-07-09 18:21:50,317 INFO L226 Difference]: Without dead ends: 7422 [2021-07-09 18:21:50,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2092.8ms TimeCoverageRelationStatistics Valid=550, Invalid=3110, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:21:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-07-09 18:21:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 5480. [2021-07-09 18:21:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.37999634969885) internal successors, (18519), 5479 states have internal predecessors, (18519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:50,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18519 transitions. [2021-07-09 18:21:50,410 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18519 transitions. Word has length 30 [2021-07-09 18:21:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:50,411 INFO L482 AbstractCegarLoop]: Abstraction has 5480 states and 18519 transitions. [2021-07-09 18:21:50,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:21:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18519 transitions. [2021-07-09 18:21:50,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:50,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:50,421 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:50,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:21:50,621 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1933873822, now seen corresponding path program 23 times [2021-07-09 18:21:50,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:50,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493932091] [2021-07-09 18:21:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:50,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:50,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493932091] [2021-07-09 18:21:50,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493932091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:50,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933492990] [2021-07-09 18:21:50,903 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 [2021-07-09 18:21:50,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:21:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:21:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:51,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:51,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:21:51,048 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:21:51,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:51,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:51,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:21:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:51,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933492990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:51,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:51,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:21:51,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317257866] [2021-07-09 18:21:51,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:21:51,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:21:51,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:21:51,116 INFO L87 Difference]: Start difference. First operand 5480 states and 18519 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-07-09 18:21:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:55,051 INFO L93 Difference]: Finished difference Result 8651 states and 28099 transitions. [2021-07-09 18:21:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:21:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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 30 [2021-07-09 18:21:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:55,067 INFO L225 Difference]: With dead ends: 8651 [2021-07-09 18:21:55,067 INFO L226 Difference]: Without dead ends: 8626 [2021-07-09 18:21:55,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 3288.2ms TimeCoverageRelationStatistics Valid=720, Invalid=5442, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:21:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-07-09 18:21:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 5486. [2021-07-09 18:21:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 3.3808568824065635) internal successors, (18544), 5485 states have internal predecessors, (18544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:55,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 18544 transitions. [2021-07-09 18:21:55,182 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 18544 transitions. Word has length 30 [2021-07-09 18:21:55,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:55,182 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 18544 transitions. [2021-07-09 18:21:55,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 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) [2021-07-09 18:21:55,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 18544 transitions. [2021-07-09 18:21:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:21:55,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:55,190 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:55,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:21:55,390 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash 372399859, now seen corresponding path program 18 times [2021-07-09 18:21:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:55,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466123519] [2021-07-09 18:21:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:55,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:55,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466123519] [2021-07-09 18:21:55,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466123519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:55,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500785211] [2021-07-09 18:21:55,868 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 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 [2021-07-09 18:21:55,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:21:55,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:21:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:56,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:56,147 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 21 treesize of output 37 [2021-07-09 18:21:56,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:56,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:56,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:56,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-07-09 18:21:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:56,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500785211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:56,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:56,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:21:56,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750934696] [2021-07-09 18:21:56,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:21:56,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:56,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:21:56,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:21:56,258 INFO L87 Difference]: Start difference. First operand 5486 states and 18544 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:22:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:01,356 INFO L93 Difference]: Finished difference Result 8032 states and 26021 transitions. [2021-07-09 18:22:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:22:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 [2021-07-09 18:22:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:01,370 INFO L225 Difference]: With dead ends: 8032 [2021-07-09 18:22:01,370 INFO L226 Difference]: Without dead ends: 7995 [2021-07-09 18:22:01,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 4257.8ms TimeCoverageRelationStatistics Valid=950, Invalid=7606, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:22:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-09 18:22:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 5520. [2021-07-09 18:22:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5520 states, 5519 states have (on average 3.3812284834209096) internal successors, (18661), 5519 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5520 states to 5520 states and 18661 transitions. [2021-07-09 18:22:01,461 INFO L78 Accepts]: Start accepts. Automaton has 5520 states and 18661 transitions. Word has length 30 [2021-07-09 18:22:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:01,462 INFO L482 AbstractCegarLoop]: Abstraction has 5520 states and 18661 transitions. [2021-07-09 18:22:01,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:22:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5520 states and 18661 transitions. [2021-07-09 18:22:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:01,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:01,469 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:01,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-09 18:22:01,673 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash 577548821, now seen corresponding path program 19 times [2021-07-09 18:22:01,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:01,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942120505] [2021-07-09 18:22:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:01,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:01,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942120505] [2021-07-09 18:22:01,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942120505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:01,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729292471] [2021-07-09 18:22:01,963 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 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 [2021-07-09 18:22:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:22:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:02,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:02,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:02,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:02,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:02,168 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 21 treesize of output 11 [2021-07-09 18:22:02,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:02,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:02,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:02,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:22:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729292471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:02,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:02,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-09 18:22:02,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093316965] [2021-07-09 18:22:02,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:22:02,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:22:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:02,221 INFO L87 Difference]: Start difference. First operand 5520 states and 18661 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:22:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:05,306 INFO L93 Difference]: Finished difference Result 9535 states and 31254 transitions. [2021-07-09 18:22:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:22:05,307 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-07-09 18:22:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:05,325 INFO L225 Difference]: With dead ends: 9535 [2021-07-09 18:22:05,325 INFO L226 Difference]: Without dead ends: 9505 [2021-07-09 18:22:05,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2582.5ms TimeCoverageRelationStatistics Valid=693, Invalid=3863, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:22:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9505 states. [2021-07-09 18:22:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9505 to 5583. [2021-07-09 18:22:05,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5582 states have (on average 3.3885704048728056) internal successors, (18915), 5582 states have internal predecessors, (18915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 18915 transitions. [2021-07-09 18:22:05,434 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 18915 transitions. Word has length 30 [2021-07-09 18:22:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:05,434 INFO L482 AbstractCegarLoop]: Abstraction has 5583 states and 18915 transitions. [2021-07-09 18:22:05,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:22:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 18915 transitions. [2021-07-09 18:22:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:05,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:05,442 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:05,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:05,642 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:05,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:05,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1944310639, now seen corresponding path program 20 times [2021-07-09 18:22:05,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:05,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37315229] [2021-07-09 18:22:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:05,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:05,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37315229] [2021-07-09 18:22:05,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37315229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:05,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453611883] [2021-07-09 18:22:05,936 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 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 [2021-07-09 18:22:05,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:05,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:22:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:06,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:06,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:06,133 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-09 18:22:06,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:22:06,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:06,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:06,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-09 18:22:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:06,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453611883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:06,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:06,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-09 18:22:06,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133006526] [2021-07-09 18:22:06,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:22:06,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:06,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:22:06,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:06,194 INFO L87 Difference]: Start difference. First operand 5583 states and 18915 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:10,953 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-09 18:22:12,732 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-07-09 18:22:14,120 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-07-09 18:22:14,480 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-07-09 18:22:15,069 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-07-09 18:22:16,538 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-09 18:22:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:17,184 INFO L93 Difference]: Finished difference Result 11977 states and 38541 transitions. [2021-07-09 18:22:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-07-09 18:22:17,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:22:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:17,208 INFO L225 Difference]: With dead ends: 11977 [2021-07-09 18:22:17,208 INFO L226 Difference]: Without dead ends: 11930 [2021-07-09 18:22:17,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 9726.6ms TimeCoverageRelationStatistics Valid=3976, Invalid=22756, Unknown=0, NotChecked=0, Total=26732 [2021-07-09 18:22:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11930 states. [2021-07-09 18:22:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11930 to 5693. [2021-07-09 18:22:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5693 states, 5692 states have (on average 3.3979269149683766) internal successors, (19341), 5692 states have internal predecessors, (19341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5693 states to 5693 states and 19341 transitions. [2021-07-09 18:22:17,372 INFO L78 Accepts]: Start accepts. Automaton has 5693 states and 19341 transitions. Word has length 30 [2021-07-09 18:22:17,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:17,373 INFO L482 AbstractCegarLoop]: Abstraction has 5693 states and 19341 transitions. [2021-07-09 18:22:17,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5693 states and 19341 transitions. [2021-07-09 18:22:17,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:17,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:17,380 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:17,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:22:17,581 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1119676269, now seen corresponding path program 21 times [2021-07-09 18:22:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:17,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819751513] [2021-07-09 18:22:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:18,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:18,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819751513] [2021-07-09 18:22:18,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819751513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:18,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622444306] [2021-07-09 18:22:18,024 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 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 [2021-07-09 18:22:18,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:18,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:22:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:18,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:18,276 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 21 treesize of output 11 [2021-07-09 18:22:18,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:22:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:18,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622444306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:18,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:18,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:22:18,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187645794] [2021-07-09 18:22:18,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:22:18,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:22:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:22:18,299 INFO L87 Difference]: Start difference. First operand 5693 states and 19341 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:21,754 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-09 18:22:22,178 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-07-09 18:22:22,920 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-07-09 18:22:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:23,442 INFO L93 Difference]: Finished difference Result 7655 states and 25147 transitions. [2021-07-09 18:22:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:22:23,443 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:22:23,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:23,457 INFO L225 Difference]: With dead ends: 7655 [2021-07-09 18:22:23,457 INFO L226 Difference]: Without dead ends: 7629 [2021-07-09 18:22:23,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4261.5ms TimeCoverageRelationStatistics Valid=738, Invalid=6234, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:22:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2021-07-09 18:22:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 5684. [2021-07-09 18:22:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5684 states, 5683 states have (on average 3.39767728312511) internal successors, (19309), 5683 states have internal predecessors, (19309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5684 states to 5684 states and 19309 transitions. [2021-07-09 18:22:23,549 INFO L78 Accepts]: Start accepts. Automaton has 5684 states and 19309 transitions. Word has length 30 [2021-07-09 18:22:23,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:23,549 INFO L482 AbstractCegarLoop]: Abstraction has 5684 states and 19309 transitions. [2021-07-09 18:22:23,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:23,549 INFO L276 IsEmpty]: Start isEmpty. Operand 5684 states and 19309 transitions. [2021-07-09 18:22:23,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:23,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:23,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:23,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:22:23,782 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:23,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:23,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1069732346, now seen corresponding path program 24 times [2021-07-09 18:22:23,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:23,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577181572] [2021-07-09 18:22:23,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:24,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:24,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577181572] [2021-07-09 18:22:24,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577181572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:24,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687403658] [2021-07-09 18:22:24,010 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 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 [2021-07-09 18:22:24,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:22:24,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:22:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:24,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:24,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:22:24,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:24,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:24,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:24,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:22:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:24,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687403658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:24,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:24,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:22:24,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805707678] [2021-07-09 18:22:24,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:22:24,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:22:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:22:24,247 INFO L87 Difference]: Start difference. First operand 5684 states and 19309 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:22:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:25,912 INFO L93 Difference]: Finished difference Result 6886 states and 22588 transitions. [2021-07-09 18:22:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:22:25,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:22:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:25,927 INFO L225 Difference]: With dead ends: 6886 [2021-07-09 18:22:25,927 INFO L226 Difference]: Without dead ends: 6871 [2021-07-09 18:22:25,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1297.8ms TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:22:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-07-09 18:22:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 5694. [2021-07-09 18:22:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3975057087651503) internal successors, (19342), 5693 states have internal predecessors, (19342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19342 transitions. [2021-07-09 18:22:26,024 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19342 transitions. Word has length 30 [2021-07-09 18:22:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:26,024 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19342 transitions. [2021-07-09 18:22:26,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:22:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19342 transitions. [2021-07-09 18:22:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:26,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:26,032 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:26,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:26,233 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:26,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:26,233 INFO L82 PathProgramCache]: Analyzing trace with hash 804664962, now seen corresponding path program 25 times [2021-07-09 18:22:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:26,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713135935] [2021-07-09 18:22:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:26,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:26,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713135935] [2021-07-09 18:22:26,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713135935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:26,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069030971] [2021-07-09 18:22:26,448 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 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 [2021-07-09 18:22:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:26,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:22:26,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:26,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:26,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:26,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:22:26,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:26,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:26,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:26,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:22:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:26,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069030971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:26,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:26,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:22:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800262896] [2021-07-09 18:22:26,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:22:26,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:22:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:22:26,681 INFO L87 Difference]: Start difference. First operand 5694 states and 19342 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:22:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:28,175 INFO L93 Difference]: Finished difference Result 6877 states and 22547 transitions. [2021-07-09 18:22:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:22:28,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-07-09 18:22:28,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:28,188 INFO L225 Difference]: With dead ends: 6877 [2021-07-09 18:22:28,188 INFO L226 Difference]: Without dead ends: 6847 [2021-07-09 18:22:28,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1269.8ms TimeCoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:22:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6847 states. [2021-07-09 18:22:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6847 to 5686. [2021-07-09 18:22:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5686 states, 5685 states have (on average 3.39806508355321) internal successors, (19318), 5685 states have internal predecessors, (19318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5686 states to 5686 states and 19318 transitions. [2021-07-09 18:22:28,273 INFO L78 Accepts]: Start accepts. Automaton has 5686 states and 19318 transitions. Word has length 30 [2021-07-09 18:22:28,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:28,273 INFO L482 AbstractCegarLoop]: Abstraction has 5686 states and 19318 transitions. [2021-07-09 18:22:28,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:22:28,273 INFO L276 IsEmpty]: Start isEmpty. Operand 5686 states and 19318 transitions. [2021-07-09 18:22:28,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:28,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:28,281 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:28,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:28,482 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2028611540, now seen corresponding path program 26 times [2021-07-09 18:22:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:28,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591961739] [2021-07-09 18:22:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:28,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591961739] [2021-07-09 18:22:28,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591961739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794011918] [2021-07-09 18:22:28,802 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 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 [2021-07-09 18:22:28,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:22:28,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:28,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,996 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 21 treesize of output 19 [2021-07-09 18:22:28,997 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:29,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:29,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:22:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:29,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794011918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:29,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:29,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:22:29,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115396615] [2021-07-09 18:22:29,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:22:29,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:22:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:22:29,050 INFO L87 Difference]: Start difference. First operand 5686 states and 19318 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:22:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:31,537 INFO L93 Difference]: Finished difference Result 10041 states and 32850 transitions. [2021-07-09 18:22:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:22:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:22:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:31,559 INFO L225 Difference]: With dead ends: 10041 [2021-07-09 18:22:31,560 INFO L226 Difference]: Without dead ends: 9990 [2021-07-09 18:22:31,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1934.4ms TimeCoverageRelationStatistics Valid=588, Invalid=3444, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:22:31,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-07-09 18:22:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 5722. [2021-07-09 18:22:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5722 states, 5721 states have (on average 3.3997552875371437) internal successors, (19450), 5721 states have internal predecessors, (19450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5722 states to 5722 states and 19450 transitions. [2021-07-09 18:22:31,693 INFO L78 Accepts]: Start accepts. Automaton has 5722 states and 19450 transitions. Word has length 30 [2021-07-09 18:22:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:31,693 INFO L482 AbstractCegarLoop]: Abstraction has 5722 states and 19450 transitions. [2021-07-09 18:22:31,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:22:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 5722 states and 19450 transitions. [2021-07-09 18:22:31,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:31,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:31,700 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:31,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:31,901 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 904208534, now seen corresponding path program 27 times [2021-07-09 18:22:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:31,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480233701] [2021-07-09 18:22:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:32,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480233701] [2021-07-09 18:22:32,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480233701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660352166] [2021-07-09 18:22:32,115 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 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 [2021-07-09 18:22:32,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:32,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:22:32,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:32,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:32,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:22:32,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:22:32,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:32,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:32,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-07-09 18:22:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:32,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660352166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:32,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:32,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-07-09 18:22:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597836776] [2021-07-09 18:22:32,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:22:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:32,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:22:32,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:22:32,473 INFO L87 Difference]: Start difference. First operand 5722 states and 19450 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:38,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:38,370 INFO L93 Difference]: Finished difference Result 9402 states and 30638 transitions. [2021-07-09 18:22:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:22:38,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:22:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:38,387 INFO L225 Difference]: With dead ends: 9402 [2021-07-09 18:22:38,388 INFO L226 Difference]: Without dead ends: 9361 [2021-07-09 18:22:38,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4560.3ms TimeCoverageRelationStatistics Valid=1092, Invalid=9008, Unknown=0, NotChecked=0, Total=10100 [2021-07-09 18:22:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2021-07-09 18:22:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 5721. [2021-07-09 18:22:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5721 states, 5720 states have (on average 3.3998251748251747) internal successors, (19447), 5720 states have internal predecessors, (19447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5721 states to 5721 states and 19447 transitions. [2021-07-09 18:22:38,495 INFO L78 Accepts]: Start accepts. Automaton has 5721 states and 19447 transitions. Word has length 30 [2021-07-09 18:22:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:38,495 INFO L482 AbstractCegarLoop]: Abstraction has 5721 states and 19447 transitions. [2021-07-09 18:22:38,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5721 states and 19447 transitions. [2021-07-09 18:22:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:38,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:38,503 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:38,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:22:38,704 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 981599646, now seen corresponding path program 28 times [2021-07-09 18:22:38,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:38,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875504484] [2021-07-09 18:22:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:38,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:38,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875504484] [2021-07-09 18:22:38,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875504484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:38,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449945741] [2021-07-09 18:22:38,932 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 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 [2021-07-09 18:22:38,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:38,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:22:38,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:39,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:39,162 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 19 treesize of output 11 [2021-07-09 18:22:39,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:39,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:39,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:39,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:22:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:39,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449945741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:39,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:39,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:22:39,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641142660] [2021-07-09 18:22:39,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:22:39,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:39,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:22:39,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:22:39,189 INFO L87 Difference]: Start difference. First operand 5721 states and 19447 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:22:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:40,826 INFO L93 Difference]: Finished difference Result 7360 states and 24539 transitions. [2021-07-09 18:22:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:22:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-07-09 18:22:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:40,841 INFO L225 Difference]: With dead ends: 7360 [2021-07-09 18:22:40,841 INFO L226 Difference]: Without dead ends: 7345 [2021-07-09 18:22:40,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1343.6ms TimeCoverageRelationStatistics Valid=306, Invalid=1856, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:22:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7345 states. [2021-07-09 18:22:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7345 to 5726. [2021-07-09 18:22:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5726 states, 5725 states have (on average 3.399475982532751) internal successors, (19462), 5725 states have internal predecessors, (19462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5726 states to 5726 states and 19462 transitions. [2021-07-09 18:22:40,939 INFO L78 Accepts]: Start accepts. Automaton has 5726 states and 19462 transitions. Word has length 30 [2021-07-09 18:22:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:40,939 INFO L482 AbstractCegarLoop]: Abstraction has 5726 states and 19462 transitions. [2021-07-09 18:22:40,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:22:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 5726 states and 19462 transitions. [2021-07-09 18:22:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:40,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:40,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:41,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:41,147 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -932624076, now seen corresponding path program 29 times [2021-07-09 18:22:41,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:41,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230207230] [2021-07-09 18:22:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:41,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:41,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230207230] [2021-07-09 18:22:41,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230207230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:41,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293134854] [2021-07-09 18:22:41,375 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 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 [2021-07-09 18:22:41,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:22:41,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:41,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:22:41,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:41,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:41,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:22:41,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:41,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:41,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:41,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:22:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:41,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293134854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:41,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:41,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 18:22:41,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209292858] [2021-07-09 18:22:41,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:22:41,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:22:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:22:41,624 INFO L87 Difference]: Start difference. First operand 5726 states and 19462 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2021-07-09 18:22:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:43,310 INFO L93 Difference]: Finished difference Result 7333 states and 24469 transitions. [2021-07-09 18:22:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:22:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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 30 [2021-07-09 18:22:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:43,330 INFO L225 Difference]: With dead ends: 7333 [2021-07-09 18:22:43,330 INFO L226 Difference]: Without dead ends: 7318 [2021-07-09 18:22:43,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1343.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:22:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-07-09 18:22:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 5723. [2021-07-09 18:22:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.399860188745194) internal successors, (19454), 5722 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:43,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19454 transitions. [2021-07-09 18:22:43,427 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19454 transitions. Word has length 30 [2021-07-09 18:22:43,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:43,427 INFO L482 AbstractCegarLoop]: Abstraction has 5723 states and 19454 transitions. [2021-07-09 18:22:43,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 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) [2021-07-09 18:22:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19454 transitions. [2021-07-09 18:22:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:43,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:43,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:43,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:43,636 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 946570758, now seen corresponding path program 30 times [2021-07-09 18:22:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:43,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754185958] [2021-07-09 18:22:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:43,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:43,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754185958] [2021-07-09 18:22:43,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754185958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:43,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078228776] [2021-07-09 18:22:43,871 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 [2021-07-09 18:22:43,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:22:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:43,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:22:43,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:44,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:44,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:44,038 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 19 treesize of output 19 [2021-07-09 18:22:44,039 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:44,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:44,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:44,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:22:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:44,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078228776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:44,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:44,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-09 18:22:44,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564423734] [2021-07-09 18:22:44,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:22:44,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:22:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:22:44,111 INFO L87 Difference]: Start difference. First operand 5723 states and 19454 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:47,635 INFO L93 Difference]: Finished difference Result 7729 states and 25674 transitions. [2021-07-09 18:22:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:22:47,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:22:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:47,650 INFO L225 Difference]: With dead ends: 7729 [2021-07-09 18:22:47,650 INFO L226 Difference]: Without dead ends: 7704 [2021-07-09 18:22:47,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2846.1ms TimeCoverageRelationStatistics Valid=615, Invalid=4077, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:22:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7704 states. [2021-07-09 18:22:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7704 to 5705. [2021-07-09 18:22:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5704 states have (on average 3.399193548387097) internal successors, (19389), 5704 states have internal predecessors, (19389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 19389 transitions. [2021-07-09 18:22:47,752 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 19389 transitions. Word has length 30 [2021-07-09 18:22:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:47,752 INFO L482 AbstractCegarLoop]: Abstraction has 5705 states and 19389 transitions. [2021-07-09 18:22:47,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 19389 transitions. [2021-07-09 18:22:47,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:47,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:47,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:47,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-09 18:22:47,961 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2078010192, now seen corresponding path program 31 times [2021-07-09 18:22:47,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:47,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266091709] [2021-07-09 18:22:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:48,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266091709] [2021-07-09 18:22:48,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266091709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:48,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798311159] [2021-07-09 18:22:48,199 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 [2021-07-09 18:22:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:22:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:48,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:48,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:48,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:22:48,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:48,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:48,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:48,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:22:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798311159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:48,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:48,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:22:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945530096] [2021-07-09 18:22:48,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:22:48,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:22:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:22:48,463 INFO L87 Difference]: Start difference. First operand 5705 states and 19389 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:22:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:50,491 INFO L93 Difference]: Finished difference Result 7595 states and 25322 transitions. [2021-07-09 18:22:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:22:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-07-09 18:22:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:50,506 INFO L225 Difference]: With dead ends: 7595 [2021-07-09 18:22:50,506 INFO L226 Difference]: Without dead ends: 7580 [2021-07-09 18:22:50,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1672.3ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:22:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7580 states. [2021-07-09 18:22:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7580 to 5709. [2021-07-09 18:22:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 3.399614576033637) internal successors, (19405), 5708 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 19405 transitions. [2021-07-09 18:22:50,602 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 19405 transitions. Word has length 30 [2021-07-09 18:22:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:50,602 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 19405 transitions. [2021-07-09 18:22:50,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:22:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 19405 transitions. [2021-07-09 18:22:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:50,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:50,611 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:50,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:22:50,811 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash -272462056, now seen corresponding path program 32 times [2021-07-09 18:22:50,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:50,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641317464] [2021-07-09 18:22:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:51,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:51,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641317464] [2021-07-09 18:22:51,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641317464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:51,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882454271] [2021-07-09 18:22:51,062 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 [2021-07-09 18:22:51,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:51,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:51,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:22:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:51,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:51,219 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 19 treesize of output 19 [2021-07-09 18:22:51,221 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:51,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:51,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:51,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:22:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:51,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882454271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:51,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:51,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:22:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014995493] [2021-07-09 18:22:51,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:22:51,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:22:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:22:51,284 INFO L87 Difference]: Start difference. First operand 5709 states and 19405 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:22:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:54,718 INFO L93 Difference]: Finished difference Result 8496 states and 28174 transitions. [2021-07-09 18:22:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:22:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-07-09 18:22:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:54,735 INFO L225 Difference]: With dead ends: 8496 [2021-07-09 18:22:54,735 INFO L226 Difference]: Without dead ends: 8471 [2021-07-09 18:22:54,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2934.3ms TimeCoverageRelationStatistics Valid=835, Invalid=5171, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:22:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8471 states. [2021-07-09 18:22:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8471 to 5694. [2021-07-09 18:22:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5694 states, 5693 states have (on average 3.3990865975759705) internal successors, (19351), 5693 states have internal predecessors, (19351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5694 states to 5694 states and 19351 transitions. [2021-07-09 18:22:54,860 INFO L78 Accepts]: Start accepts. Automaton has 5694 states and 19351 transitions. Word has length 30 [2021-07-09 18:22:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:54,860 INFO L482 AbstractCegarLoop]: Abstraction has 5694 states and 19351 transitions. [2021-07-09 18:22:54,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:22:54,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5694 states and 19351 transitions. [2021-07-09 18:22:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:54,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:54,869 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:55,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:22:55,069 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1633979309, now seen corresponding path program 30 times [2021-07-09 18:22:55,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:55,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455125171] [2021-07-09 18:22:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:55,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455125171] [2021-07-09 18:22:55,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455125171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:55,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901943139] [2021-07-09 18:22:55,178 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 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 [2021-07-09 18:22:55,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:22:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:22:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:55,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:22:55,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:22:55,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:55,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:55,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:38 [2021-07-09 18:22:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:55,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901943139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:55,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:55,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 21 [2021-07-09 18:22:55,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566447487] [2021-07-09 18:22:55,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:22:55,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:55,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:22:55,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:22:55,513 INFO L87 Difference]: Start difference. First operand 5694 states and 19351 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:56,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:56,242 INFO L93 Difference]: Finished difference Result 7140 states and 23704 transitions. [2021-07-09 18:22:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:22:56,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:22:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:56,255 INFO L225 Difference]: With dead ends: 7140 [2021-07-09 18:22:56,255 INFO L226 Difference]: Without dead ends: 7002 [2021-07-09 18:22:56,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:22:56,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7002 states. [2021-07-09 18:22:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7002 to 5718. [2021-07-09 18:22:56,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 3.3998600664684275) internal successors, (19437), 5717 states have internal predecessors, (19437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 19437 transitions. [2021-07-09 18:22:56,342 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 19437 transitions. Word has length 30 [2021-07-09 18:22:56,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:56,342 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 19437 transitions. [2021-07-09 18:22:56,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:56,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 19437 transitions. [2021-07-09 18:22:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:56,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:56,350 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:56,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 18:22:56,550 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:56,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:56,551 INFO L82 PathProgramCache]: Analyzing trace with hash -679268830, now seen corresponding path program 33 times [2021-07-09 18:22:56,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:56,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482558932] [2021-07-09 18:22:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:56,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482558932] [2021-07-09 18:22:56,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482558932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:56,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449290519] [2021-07-09 18:22:56,903 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 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 [2021-07-09 18:22:56,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:22:56,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:22:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:57,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:57,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:22:57,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:57,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:57,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:57,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-07-09 18:22:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:57,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449290519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:57,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:57,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-09 18:22:57,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845464003] [2021-07-09 18:22:57,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:22:57,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:57,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:22:57,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:22:57,297 INFO L87 Difference]: Start difference. First operand 5718 states and 19437 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:22:58,111 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-07-09 18:22:58,567 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-07-09 18:22:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:59,423 INFO L93 Difference]: Finished difference Result 8751 states and 28822 transitions. [2021-07-09 18:22:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:22:59,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:22:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:59,440 INFO L225 Difference]: With dead ends: 8751 [2021-07-09 18:22:59,440 INFO L226 Difference]: Without dead ends: 8725 [2021-07-09 18:22:59,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1873.8ms TimeCoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:22:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8725 states. [2021-07-09 18:22:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8725 to 5809. [2021-07-09 18:22:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 5808 states have (on average 3.4013429752066116) internal successors, (19755), 5808 states have internal predecessors, (19755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 19755 transitions. [2021-07-09 18:22:59,543 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 19755 transitions. Word has length 30 [2021-07-09 18:22:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:59,544 INFO L482 AbstractCegarLoop]: Abstraction has 5809 states and 19755 transitions. [2021-07-09 18:22:59,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:22:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 19755 transitions. [2021-07-09 18:22:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:22:59,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:59,552 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:59,753 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -190748142, now seen corresponding path program 34 times [2021-07-09 18:22:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629785793] [2021-07-09 18:22:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:59,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:59,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629785793] [2021-07-09 18:22:59,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629785793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:59,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789153378] [2021-07-09 18:22:59,907 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 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 [2021-07-09 18:22:59,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:59,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:59,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:22:59,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:00,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:00,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:23:00,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:00,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:00,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:00,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:23:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789153378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:00,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:00,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:23:00,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772054126] [2021-07-09 18:23:00,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:00,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:00,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:00,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:00,144 INFO L87 Difference]: Start difference. First operand 5809 states and 19755 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:02,317 INFO L93 Difference]: Finished difference Result 10525 states and 34115 transitions. [2021-07-09 18:23:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:23:02,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:02,340 INFO L225 Difference]: With dead ends: 10525 [2021-07-09 18:23:02,340 INFO L226 Difference]: Without dead ends: 10504 [2021-07-09 18:23:02,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1543.3ms TimeCoverageRelationStatistics Valid=552, Invalid=3870, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:23:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10504 states. [2021-07-09 18:23:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10504 to 5873. [2021-07-09 18:23:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5873 states, 5872 states have (on average 3.403440054495913) internal successors, (19985), 5872 states have internal predecessors, (19985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 19985 transitions. [2021-07-09 18:23:02,469 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 19985 transitions. Word has length 30 [2021-07-09 18:23:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:02,469 INFO L482 AbstractCegarLoop]: Abstraction has 5873 states and 19985 transitions. [2021-07-09 18:23:02,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 19985 transitions. [2021-07-09 18:23:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:02,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:02,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:02,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:02,678 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:02,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2047177872, now seen corresponding path program 35 times [2021-07-09 18:23:02,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:02,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43910372] [2021-07-09 18:23:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:02,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:02,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43910372] [2021-07-09 18:23:02,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43910372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:02,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474135910] [2021-07-09 18:23:02,869 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 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 [2021-07-09 18:23:02,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:23:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:23:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:03,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:03,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:23:03,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:03,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:03,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:23:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474135910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:03,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:03,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:23:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34370380] [2021-07-09 18:23:03,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:03,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:03,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:03,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:03,113 INFO L87 Difference]: Start difference. First operand 5873 states and 19985 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:04,489 INFO L93 Difference]: Finished difference Result 9687 states and 31917 transitions. [2021-07-09 18:23:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:23:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:04,510 INFO L225 Difference]: With dead ends: 9687 [2021-07-09 18:23:04,510 INFO L226 Difference]: Without dead ends: 9666 [2021-07-09 18:23:04,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:23:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-07-09 18:23:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 5903. [2021-07-09 18:23:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 3.4056252117926125) internal successors, (20100), 5902 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 20100 transitions. [2021-07-09 18:23:04,652 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 20100 transitions. Word has length 30 [2021-07-09 18:23:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:04,652 INFO L482 AbstractCegarLoop]: Abstraction has 5903 states and 20100 transitions. [2021-07-09 18:23:04,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 20100 transitions. [2021-07-09 18:23:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:04,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:04,661 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:04,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:04,862 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash -274070036, now seen corresponding path program 36 times [2021-07-09 18:23:04,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:04,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851285784] [2021-07-09 18:23:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:05,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851285784] [2021-07-09 18:23:05,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851285784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:05,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940459531] [2021-07-09 18:23:05,025 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 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 [2021-07-09 18:23:05,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:23:05,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:05,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:05,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:05,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:05,250 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 19 treesize of output 19 [2021-07-09 18:23:05,252 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:05,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:05,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:05,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:23:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940459531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:23:05,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969823423] [2021-07-09 18:23:05,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:05,310 INFO L87 Difference]: Start difference. First operand 5903 states and 20100 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:07,644 INFO L93 Difference]: Finished difference Result 10523 states and 34450 transitions. [2021-07-09 18:23:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:23:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:07,669 INFO L225 Difference]: With dead ends: 10523 [2021-07-09 18:23:07,669 INFO L226 Difference]: Without dead ends: 10456 [2021-07-09 18:23:07,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1691.9ms TimeCoverageRelationStatistics Valid=618, Invalid=3542, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:23:07,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2021-07-09 18:23:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 5965. [2021-07-09 18:23:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5965 states, 5964 states have (on average 3.416834339369551) internal successors, (20378), 5964 states have internal predecessors, (20378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5965 states to 5965 states and 20378 transitions. [2021-07-09 18:23:07,806 INFO L78 Accepts]: Start accepts. Automaton has 5965 states and 20378 transitions. Word has length 30 [2021-07-09 18:23:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:07,806 INFO L482 AbstractCegarLoop]: Abstraction has 5965 states and 20378 transitions. [2021-07-09 18:23:07,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5965 states and 20378 transitions. [2021-07-09 18:23:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:07,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:07,816 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:08,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-07-09 18:23:08,017 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 87027730, now seen corresponding path program 37 times [2021-07-09 18:23:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:08,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857572469] [2021-07-09 18:23:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:08,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:08,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857572469] [2021-07-09 18:23:08,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857572469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:08,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139965227] [2021-07-09 18:23:08,206 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 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 [2021-07-09 18:23:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,388 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 29 treesize of output 25 [2021-07-09 18:23:08,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:08,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:23:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:08,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139965227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:08,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:08,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:23:08,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11251189] [2021-07-09 18:23:08,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:08,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:08,461 INFO L87 Difference]: Start difference. First operand 5965 states and 20378 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:09,651 INFO L93 Difference]: Finished difference Result 9182 states and 30455 transitions. [2021-07-09 18:23:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:23:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:09,671 INFO L225 Difference]: With dead ends: 9182 [2021-07-09 18:23:09,671 INFO L226 Difference]: Without dead ends: 9105 [2021-07-09 18:23:09,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 987.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:23:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-07-09 18:23:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 5990. [2021-07-09 18:23:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 3.418600768074804) internal successors, (20474), 5989 states have internal predecessors, (20474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 20474 transitions. [2021-07-09 18:23:09,792 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 20474 transitions. Word has length 30 [2021-07-09 18:23:09,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:09,792 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 20474 transitions. [2021-07-09 18:23:09,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:09,792 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 20474 transitions. [2021-07-09 18:23:09,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:09,801 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:09,801 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:10,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 18:23:10,002 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:10,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2029342979, now seen corresponding path program 31 times [2021-07-09 18:23:10,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:10,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796967853] [2021-07-09 18:23:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:10,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:10,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796967853] [2021-07-09 18:23:10,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796967853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:10,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710074975] [2021-07-09 18:23:10,108 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 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 [2021-07-09 18:23:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:23:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:10,239 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 19 treesize of output 11 [2021-07-09 18:23:10,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:10,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:10,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:10,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:23:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:10,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710074975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:10,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:10,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:23:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122039709] [2021-07-09 18:23:10,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:23:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:23:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:23:10,263 INFO L87 Difference]: Start difference. First operand 5990 states and 20474 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:23:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:10,457 INFO L93 Difference]: Finished difference Result 6518 states and 22032 transitions. [2021-07-09 18:23:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:23:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 30 [2021-07-09 18:23:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:10,470 INFO L225 Difference]: With dead ends: 6518 [2021-07-09 18:23:10,470 INFO L226 Difference]: Without dead ends: 6449 [2021-07-09 18:23:10,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:23:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2021-07-09 18:23:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 6000. [2021-07-09 18:23:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6000 states, 5999 states have (on average 3.4140690115019168) internal successors, (20481), 5999 states have internal predecessors, (20481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6000 states to 6000 states and 20481 transitions. [2021-07-09 18:23:10,580 INFO L78 Accepts]: Start accepts. Automaton has 6000 states and 20481 transitions. Word has length 30 [2021-07-09 18:23:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:10,580 INFO L482 AbstractCegarLoop]: Abstraction has 6000 states and 20481 transitions. [2021-07-09 18:23:10,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:23:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 6000 states and 20481 transitions. [2021-07-09 18:23:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:10,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:10,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:10,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 18:23:10,789 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -824418271, now seen corresponding path program 32 times [2021-07-09 18:23:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:10,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314428315] [2021-07-09 18:23:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:10,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314428315] [2021-07-09 18:23:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314428315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:10,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45882226] [2021-07-09 18:23:10,908 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 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 [2021-07-09 18:23:10,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:11,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:11,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 35 [2021-07-09 18:23:11,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:11,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:11,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:11,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:46 [2021-07-09 18:23:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:11,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45882226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:11,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:11,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 21 [2021-07-09 18:23:11,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765583449] [2021-07-09 18:23:11,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:23:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:23:11,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:23:11,288 INFO L87 Difference]: Start difference. First operand 6000 states and 20481 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:12,088 INFO L93 Difference]: Finished difference Result 6705 states and 22557 transitions. [2021-07-09 18:23:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:23:12,089 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:12,101 INFO L225 Difference]: With dead ends: 6705 [2021-07-09 18:23:12,101 INFO L226 Difference]: Without dead ends: 6643 [2021-07-09 18:23:12,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:23:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2021-07-09 18:23:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6010. [2021-07-09 18:23:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 3.412880678981528) internal successors, (20508), 6009 states have internal predecessors, (20508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 20508 transitions. [2021-07-09 18:23:12,198 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 20508 transitions. Word has length 30 [2021-07-09 18:23:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:12,198 INFO L482 AbstractCegarLoop]: Abstraction has 6010 states and 20508 transitions. [2021-07-09 18:23:12,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 20508 transitions. [2021-07-09 18:23:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:12,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:12,206 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:12,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:12,409 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:12,409 INFO L82 PathProgramCache]: Analyzing trace with hash -767713039, now seen corresponding path program 33 times [2021-07-09 18:23:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:12,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360771514] [2021-07-09 18:23:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:12,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:12,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360771514] [2021-07-09 18:23:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360771514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:12,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011429931] [2021-07-09 18:23:12,568 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 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 [2021-07-09 18:23:12,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:23:12,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:23:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:12,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:12,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:23:12,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:12,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:12,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:12,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:139 [2021-07-09 18:23:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011429931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:13,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:13,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 24 [2021-07-09 18:23:13,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480098884] [2021-07-09 18:23:13,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:13,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:13,110 INFO L87 Difference]: Start difference. First operand 6010 states and 20508 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:14,395 INFO L93 Difference]: Finished difference Result 6764 states and 22726 transitions. [2021-07-09 18:23:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:23:14,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:14,409 INFO L225 Difference]: With dead ends: 6764 [2021-07-09 18:23:14,409 INFO L226 Difference]: Without dead ends: 6734 [2021-07-09 18:23:14,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1133.3ms TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:23:14,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-07-09 18:23:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6038. [2021-07-09 18:23:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6038 states, 6037 states have (on average 3.4132847440781844) internal successors, (20606), 6037 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6038 states to 6038 states and 20606 transitions. [2021-07-09 18:23:14,521 INFO L78 Accepts]: Start accepts. Automaton has 6038 states and 20606 transitions. Word has length 30 [2021-07-09 18:23:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:14,521 INFO L482 AbstractCegarLoop]: Abstraction has 6038 states and 20606 transitions. [2021-07-09 18:23:14,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6038 states and 20606 transitions. [2021-07-09 18:23:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:14,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:14,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:14,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 18:23:14,731 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:14,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:14,731 INFO L82 PathProgramCache]: Analyzing trace with hash 864921772, now seen corresponding path program 38 times [2021-07-09 18:23:14,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:14,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592439447] [2021-07-09 18:23:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:15,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:15,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592439447] [2021-07-09 18:23:15,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592439447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728938764] [2021-07-09 18:23:15,063 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 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 [2021-07-09 18:23:15,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:23:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:15,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,276 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-07-09 18:23:15,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:15,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:15,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2021-07-09 18:23:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:15,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728938764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:15,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:15,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-07-09 18:23:15,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559527394] [2021-07-09 18:23:15,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:15,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:15,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:15,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:15,416 INFO L87 Difference]: Start difference. First operand 6038 states and 20606 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:17,087 INFO L93 Difference]: Finished difference Result 7697 states and 25628 transitions. [2021-07-09 18:23:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:23:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:23:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:17,103 INFO L225 Difference]: With dead ends: 7697 [2021-07-09 18:23:17,103 INFO L226 Difference]: Without dead ends: 7671 [2021-07-09 18:23:17,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1492.2ms TimeCoverageRelationStatistics Valid=327, Invalid=2025, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:23:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2021-07-09 18:23:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6056. [2021-07-09 18:23:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6056 states, 6055 states have (on average 3.4123864574731626) internal successors, (20662), 6055 states have internal predecessors, (20662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 20662 transitions. [2021-07-09 18:23:17,206 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 20662 transitions. Word has length 30 [2021-07-09 18:23:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:17,206 INFO L482 AbstractCegarLoop]: Abstraction has 6056 states and 20662 transitions. [2021-07-09 18:23:17,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:17,206 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 20662 transitions. [2021-07-09 18:23:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:17,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:17,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:17,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-07-09 18:23:17,416 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -109421332, now seen corresponding path program 39 times [2021-07-09 18:23:17,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:17,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525142729] [2021-07-09 18:23:17,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:17,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525142729] [2021-07-09 18:23:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525142729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:17,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703358896] [2021-07-09 18:23:17,764 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 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 [2021-07-09 18:23:17,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:23:17,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:23:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:17,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:17,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-07-09 18:23:17,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:17,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:17,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:17,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:158 [2021-07-09 18:23:18,105 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-09 18:23:18,384 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-09 18:23:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:18,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703358896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:18,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:18,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:23:18,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485766003] [2021-07-09 18:23:18,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:18,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:18,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:18,534 INFO L87 Difference]: Start difference. First operand 6056 states and 20662 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:19,702 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-07-09 18:23:19,967 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-07-09 18:23:21,132 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2021-07-09 18:23:21,329 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-07-09 18:23:22,271 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-07-09 18:23:22,453 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-07-09 18:23:22,704 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-07-09 18:23:22,985 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-07-09 18:23:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:23,174 INFO L93 Difference]: Finished difference Result 8480 states and 28186 transitions. [2021-07-09 18:23:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:23:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:23,192 INFO L225 Difference]: With dead ends: 8480 [2021-07-09 18:23:23,193 INFO L226 Difference]: Without dead ends: 8427 [2021-07-09 18:23:23,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 4332.8ms TimeCoverageRelationStatistics Valid=629, Invalid=4483, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:23:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8427 states. [2021-07-09 18:23:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8427 to 6099. [2021-07-09 18:23:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6099 states, 6098 states have (on average 3.4137422105608395) internal successors, (20817), 6098 states have internal predecessors, (20817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6099 states to 6099 states and 20817 transitions. [2021-07-09 18:23:23,308 INFO L78 Accepts]: Start accepts. Automaton has 6099 states and 20817 transitions. Word has length 30 [2021-07-09 18:23:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:23,308 INFO L482 AbstractCegarLoop]: Abstraction has 6099 states and 20817 transitions. [2021-07-09 18:23:23,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:23,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6099 states and 20817 transitions. [2021-07-09 18:23:23,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:23,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:23,317 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:23,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:23,518 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2040035028, now seen corresponding path program 40 times [2021-07-09 18:23:23,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:23,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668760341] [2021-07-09 18:23:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:23,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:23,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668760341] [2021-07-09 18:23:23,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668760341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:23,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440231507] [2021-07-09 18:23:23,836 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 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 [2021-07-09 18:23:23,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:23,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:23:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:24,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:24,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:23:24,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:24,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:24,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:24,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:23:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:24,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440231507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:24,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:24,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:23:24,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190855095] [2021-07-09 18:23:24,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:23:24,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:23:24,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:23:24,068 INFO L87 Difference]: Start difference. First operand 6099 states and 20817 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-07-09 18:23:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:25,702 INFO L93 Difference]: Finished difference Result 7457 states and 24976 transitions. [2021-07-09 18:23:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:23:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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 30 [2021-07-09 18:23:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:25,717 INFO L225 Difference]: With dead ends: 7457 [2021-07-09 18:23:25,717 INFO L226 Difference]: Without dead ends: 7438 [2021-07-09 18:23:25,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1441.6ms TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:23:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2021-07-09 18:23:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 6101. [2021-07-09 18:23:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6101 states, 6100 states have (on average 3.4137704918032785) internal successors, (20824), 6100 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6101 states to 6101 states and 20824 transitions. [2021-07-09 18:23:25,825 INFO L78 Accepts]: Start accepts. Automaton has 6101 states and 20824 transitions. Word has length 30 [2021-07-09 18:23:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:25,825 INFO L482 AbstractCegarLoop]: Abstraction has 6101 states and 20824 transitions. [2021-07-09 18:23:25,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 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) [2021-07-09 18:23:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6101 states and 20824 transitions. [2021-07-09 18:23:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:25,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:25,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:26,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:26,034 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1418323052, now seen corresponding path program 41 times [2021-07-09 18:23:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:26,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560704389] [2021-07-09 18:23:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:26,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560704389] [2021-07-09 18:23:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560704389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127661157] [2021-07-09 18:23:26,222 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 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 [2021-07-09 18:23:26,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:23:26,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:26,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:23:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:26,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:23:26,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:26,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:23:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:26,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127661157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:26,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:26,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:23:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289381018] [2021-07-09 18:23:26,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:26,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:26,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:26,594 INFO L87 Difference]: Start difference. First operand 6101 states and 20824 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:28,192 INFO L93 Difference]: Finished difference Result 9244 states and 30770 transitions. [2021-07-09 18:23:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:23:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:28,212 INFO L225 Difference]: With dead ends: 9244 [2021-07-09 18:23:28,212 INFO L226 Difference]: Without dead ends: 9223 [2021-07-09 18:23:28,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1176.6ms TimeCoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:23:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-07-09 18:23:28,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 6163. [2021-07-09 18:23:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6163 states, 6162 states have (on average 3.4138266796494645) internal successors, (21036), 6162 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6163 states to 6163 states and 21036 transitions. [2021-07-09 18:23:28,334 INFO L78 Accepts]: Start accepts. Automaton has 6163 states and 21036 transitions. Word has length 30 [2021-07-09 18:23:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:28,334 INFO L482 AbstractCegarLoop]: Abstraction has 6163 states and 21036 transitions. [2021-07-09 18:23:28,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6163 states and 21036 transitions. [2021-07-09 18:23:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:28,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:28,344 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:28,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:23:28,545 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:28,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1342440280, now seen corresponding path program 42 times [2021-07-09 18:23:28,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:28,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082815483] [2021-07-09 18:23:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:28,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:28,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082815483] [2021-07-09 18:23:28,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082815483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:28,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61823757] [2021-07-09 18:23:28,939 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 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 [2021-07-09 18:23:28,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:23:28,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:29,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:29,163 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 19 treesize of output 19 [2021-07-09 18:23:29,165 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:29,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:29,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:29,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:23:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61823757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:29,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:29,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-09 18:23:29,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570197971] [2021-07-09 18:23:29,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:29,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:29,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:29,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:29,221 INFO L87 Difference]: Start difference. First operand 6163 states and 21036 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:31,735 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 18:23:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:33,414 INFO L93 Difference]: Finished difference Result 9714 states and 31902 transitions. [2021-07-09 18:23:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-09 18:23:33,414 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:33,438 INFO L225 Difference]: With dead ends: 9714 [2021-07-09 18:23:33,439 INFO L226 Difference]: Without dead ends: 9659 [2021-07-09 18:23:33,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2268 ImplicationChecksByTransitivity, 3247.8ms TimeCoverageRelationStatistics Valid=815, Invalid=6157, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:23:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9659 states. [2021-07-09 18:23:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9659 to 6173. [2021-07-09 18:23:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6172 states have (on average 3.4149384316267013) internal successors, (21077), 6172 states have internal predecessors, (21077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:33,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 21077 transitions. [2021-07-09 18:23:33,558 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 21077 transitions. Word has length 30 [2021-07-09 18:23:33,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:33,558 INFO L482 AbstractCegarLoop]: Abstraction has 6173 states and 21077 transitions. [2021-07-09 18:23:33,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:33,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 21077 transitions. [2021-07-09 18:23:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:33,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:33,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:33,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:33,783 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1284214256, now seen corresponding path program 43 times [2021-07-09 18:23:33,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:33,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805198760] [2021-07-09 18:23:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:34,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805198760] [2021-07-09 18:23:34,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805198760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776798932] [2021-07-09 18:23:34,032 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 [2021-07-09 18:23:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:34,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:34,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:34,263 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 29 treesize of output 25 [2021-07-09 18:23:34,265 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:34,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:34,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:34,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:23:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:34,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776798932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:34,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:34,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:23:34,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129644684] [2021-07-09 18:23:34,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:34,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:34,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:34,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:34,342 INFO L87 Difference]: Start difference. First operand 6173 states and 21077 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:35,706 INFO L93 Difference]: Finished difference Result 9307 states and 30934 transitions. [2021-07-09 18:23:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:23:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:35,724 INFO L225 Difference]: With dead ends: 9307 [2021-07-09 18:23:35,725 INFO L226 Difference]: Without dead ends: 9230 [2021-07-09 18:23:35,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1039.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1574, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:23:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9230 states. [2021-07-09 18:23:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9230 to 6160. [2021-07-09 18:23:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6159 states have (on average 3.4159766195811008) internal successors, (21039), 6159 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 21039 transitions. [2021-07-09 18:23:35,840 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 21039 transitions. Word has length 30 [2021-07-09 18:23:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:35,840 INFO L482 AbstractCegarLoop]: Abstraction has 6160 states and 21039 transitions. [2021-07-09 18:23:35,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:35,840 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 21039 transitions. [2021-07-09 18:23:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:35,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:35,848 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:36,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 18:23:36,052 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:36,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1930370840, now seen corresponding path program 44 times [2021-07-09 18:23:36,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:36,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102703572] [2021-07-09 18:23:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:36,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:36,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102703572] [2021-07-09 18:23:36,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102703572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:36,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012719730] [2021-07-09 18:23:36,432 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 [2021-07-09 18:23:36,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:36,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:36,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:23:36,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:36,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:36,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:36,627 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 21 treesize of output 19 [2021-07-09 18:23:36,629 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:36,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:36,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-09 18:23:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:36,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012719730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:36,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:36,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:23:36,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992104460] [2021-07-09 18:23:36,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:36,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:36,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:36,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:36,718 INFO L87 Difference]: Start difference. First operand 6160 states and 21039 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:23:40,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:40,416 INFO L93 Difference]: Finished difference Result 10757 states and 35501 transitions. [2021-07-09 18:23:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:23:40,417 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-07-09 18:23:40,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:40,437 INFO L225 Difference]: With dead ends: 10757 [2021-07-09 18:23:40,437 INFO L226 Difference]: Without dead ends: 10710 [2021-07-09 18:23:40,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2735.5ms TimeCoverageRelationStatistics Valid=765, Invalid=5397, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:23:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-07-09 18:23:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 6165. [2021-07-09 18:23:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6165 states, 6164 states have (on average 3.416288124594419) internal successors, (21058), 6164 states have internal predecessors, (21058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6165 states to 6165 states and 21058 transitions. [2021-07-09 18:23:40,569 INFO L78 Accepts]: Start accepts. Automaton has 6165 states and 21058 transitions. Word has length 30 [2021-07-09 18:23:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:40,569 INFO L482 AbstractCegarLoop]: Abstraction has 6165 states and 21058 transitions. [2021-07-09 18:23:40,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:23:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6165 states and 21058 transitions. [2021-07-09 18:23:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:40,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:40,577 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:40,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:40,778 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1586753244, now seen corresponding path program 45 times [2021-07-09 18:23:40,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:40,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74780755] [2021-07-09 18:23:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:41,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:41,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74780755] [2021-07-09 18:23:41,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74780755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:41,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670394971] [2021-07-09 18:23:41,048 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 [2021-07-09 18:23:41,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:23:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:23:41,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:41,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:41,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:23:41,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:41,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:41,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:41,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-07-09 18:23:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:41,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670394971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:41,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:41,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:23:41,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459606662] [2021-07-09 18:23:41,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:23:41,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:23:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:23:41,488 INFO L87 Difference]: Start difference. First operand 6165 states and 21058 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:45,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:45,568 INFO L93 Difference]: Finished difference Result 8909 states and 29416 transitions. [2021-07-09 18:23:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-09 18:23:45,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:23:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:45,586 INFO L225 Difference]: With dead ends: 8909 [2021-07-09 18:23:45,587 INFO L226 Difference]: Without dead ends: 8853 [2021-07-09 18:23:45,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3204.3ms TimeCoverageRelationStatistics Valid=579, Invalid=5583, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:23:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-07-09 18:23:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6186. [2021-07-09 18:23:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6186 states, 6185 states have (on average 3.4202101859337106) internal successors, (21154), 6185 states have internal predecessors, (21154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6186 states to 6186 states and 21154 transitions. [2021-07-09 18:23:45,730 INFO L78 Accepts]: Start accepts. Automaton has 6186 states and 21154 transitions. Word has length 30 [2021-07-09 18:23:45,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:45,730 INFO L482 AbstractCegarLoop]: Abstraction has 6186 states and 21154 transitions. [2021-07-09 18:23:45,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6186 states and 21154 transitions. [2021-07-09 18:23:45,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:45,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:45,739 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:45,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 18:23:45,940 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash -181911884, now seen corresponding path program 46 times [2021-07-09 18:23:45,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:45,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129407020] [2021-07-09 18:23:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:46,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:46,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129407020] [2021-07-09 18:23:46,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129407020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:46,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022139409] [2021-07-09 18:23:46,181 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 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 [2021-07-09 18:23:46,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:46,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:46,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:46,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:23:46,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:46,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:46,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:46,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:23:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:46,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022139409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:46,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:46,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:23:46,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254082331] [2021-07-09 18:23:46,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:23:46,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:23:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:23:46,414 INFO L87 Difference]: Start difference. First operand 6186 states and 21154 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:23:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:47,105 INFO L93 Difference]: Finished difference Result 7716 states and 26020 transitions. [2021-07-09 18:23:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:23:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-07-09 18:23:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:47,121 INFO L225 Difference]: With dead ends: 7716 [2021-07-09 18:23:47,122 INFO L226 Difference]: Without dead ends: 7695 [2021-07-09 18:23:47,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 576.0ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:23:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7695 states. [2021-07-09 18:23:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7695 to 6196. [2021-07-09 18:23:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 6195 states have (on average 3.419693301049233) internal successors, (21185), 6195 states have internal predecessors, (21185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 21185 transitions. [2021-07-09 18:23:47,269 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 21185 transitions. Word has length 30 [2021-07-09 18:23:47,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:47,269 INFO L482 AbstractCegarLoop]: Abstraction has 6196 states and 21185 transitions. [2021-07-09 18:23:47,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:23:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 21185 transitions. [2021-07-09 18:23:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:47,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:47,279 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:47,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 18:23:47,480 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:47,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1591195952, now seen corresponding path program 47 times [2021-07-09 18:23:47,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:47,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609285745] [2021-07-09 18:23:47,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:47,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609285745] [2021-07-09 18:23:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609285745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:47,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662483431] [2021-07-09 18:23:47,724 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 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 [2021-07-09 18:23:47,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:23:47,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:47,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:23:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:47,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:47,910 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 28 treesize of output 32 [2021-07-09 18:23:47,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:23:47,955 INFO L628 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2021-07-09 18:23:47,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:23:47,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:66 [2021-07-09 18:23:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:48,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662483431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:48,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:48,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 18:23:48,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471650046] [2021-07-09 18:23:48,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:23:48,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:23:48,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:23:48,051 INFO L87 Difference]: Start difference. First operand 6196 states and 21185 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-07-09 18:23:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:48,989 INFO L93 Difference]: Finished difference Result 8660 states and 28972 transitions. [2021-07-09 18:23:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:23:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 30 [2021-07-09 18:23:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:49,007 INFO L225 Difference]: With dead ends: 8660 [2021-07-09 18:23:49,007 INFO L226 Difference]: Without dead ends: 8610 [2021-07-09 18:23:49,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:23:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8610 states. [2021-07-09 18:23:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8610 to 6247. [2021-07-09 18:23:49,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6247 states, 6246 states have (on average 3.420268972142171) internal successors, (21363), 6246 states have internal predecessors, (21363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6247 states to 6247 states and 21363 transitions. [2021-07-09 18:23:49,173 INFO L78 Accepts]: Start accepts. Automaton has 6247 states and 21363 transitions. Word has length 30 [2021-07-09 18:23:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:49,173 INFO L482 AbstractCegarLoop]: Abstraction has 6247 states and 21363 transitions. [2021-07-09 18:23:49,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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) [2021-07-09 18:23:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6247 states and 21363 transitions. [2021-07-09 18:23:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:49,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:49,181 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:49,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-09 18:23:49,391 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1439678622, now seen corresponding path program 48 times [2021-07-09 18:23:49,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:49,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514413398] [2021-07-09 18:23:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:49,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:49,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514413398] [2021-07-09 18:23:49,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514413398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:49,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234220990] [2021-07-09 18:23:49,699 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 [2021-07-09 18:23:49,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:23:49,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:49,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:49,863 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 19 treesize of output 19 [2021-07-09 18:23:49,864 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:49,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:49,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:49,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:23:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:49,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234220990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:49,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:49,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:23:49,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606407740] [2021-07-09 18:23:49,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:49,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:49,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:49,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:49,939 INFO L87 Difference]: Start difference. First operand 6247 states and 21363 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:50,530 INFO L93 Difference]: Finished difference Result 7945 states and 26808 transitions. [2021-07-09 18:23:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:23:50,530 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:23:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:50,548 INFO L225 Difference]: With dead ends: 7945 [2021-07-09 18:23:50,548 INFO L226 Difference]: Without dead ends: 7920 [2021-07-09 18:23:50,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 619.6ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:23:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7920 states. [2021-07-09 18:23:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7920 to 6228. [2021-07-09 18:23:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 3.421069535892083) internal successors, (21303), 6227 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 21303 transitions. [2021-07-09 18:23:50,663 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 21303 transitions. Word has length 30 [2021-07-09 18:23:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:50,663 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 21303 transitions. [2021-07-09 18:23:50,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:50,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 21303 transitions. [2021-07-09 18:23:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:50,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:50,672 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:50,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:50,873 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash 603346348, now seen corresponding path program 49 times [2021-07-09 18:23:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:50,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478407533] [2021-07-09 18:23:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:51,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478407533] [2021-07-09 18:23:51,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478407533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:51,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994261984] [2021-07-09 18:23:51,191 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 [2021-07-09 18:23:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:51,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:51,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:51,358 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 19 treesize of output 19 [2021-07-09 18:23:51,360 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:51,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:51,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:51,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:23:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:51,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994261984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:51,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:51,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:23:51,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794036277] [2021-07-09 18:23:51,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:51,437 INFO L87 Difference]: Start difference. First operand 6228 states and 21303 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:52,332 INFO L93 Difference]: Finished difference Result 8032 states and 27059 transitions. [2021-07-09 18:23:52,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:23:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:23:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:52,350 INFO L225 Difference]: With dead ends: 8032 [2021-07-09 18:23:52,350 INFO L226 Difference]: Without dead ends: 8007 [2021-07-09 18:23:52,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:23:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8007 states. [2021-07-09 18:23:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8007 to 6224. [2021-07-09 18:23:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6223 states have (on average 3.421018801221276) internal successors, (21289), 6223 states have internal predecessors, (21289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 21289 transitions. [2021-07-09 18:23:52,468 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 21289 transitions. Word has length 30 [2021-07-09 18:23:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:52,469 INFO L482 AbstractCegarLoop]: Abstraction has 6224 states and 21289 transitions. [2021-07-09 18:23:52,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 21289 transitions. [2021-07-09 18:23:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:52,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:52,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:52,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-09 18:23:52,679 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:52,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1594721900, now seen corresponding path program 50 times [2021-07-09 18:23:52,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:52,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15443177] [2021-07-09 18:23:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:52,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:52,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15443177] [2021-07-09 18:23:52,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15443177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:52,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144751007] [2021-07-09 18:23:52,948 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 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 [2021-07-09 18:23:52,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:52,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:23:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:53,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:53,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:23:53,094 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:53,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:53,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:53,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:23:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:53,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144751007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:53,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:53,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:23:53,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401207971] [2021-07-09 18:23:53,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:23:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:23:53,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:23:53,158 INFO L87 Difference]: Start difference. First operand 6224 states and 21289 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:23:55,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:55,058 INFO L93 Difference]: Finished difference Result 8292 states and 27808 transitions. [2021-07-09 18:23:55,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:23:55,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-07-09 18:23:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:55,075 INFO L225 Difference]: With dead ends: 8292 [2021-07-09 18:23:55,075 INFO L226 Difference]: Without dead ends: 8267 [2021-07-09 18:23:55,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1471.8ms TimeCoverageRelationStatistics Valid=393, Invalid=2687, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:23:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8267 states. [2021-07-09 18:23:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8267 to 6232. [2021-07-09 18:23:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6232 states, 6231 states have (on average 3.4204782538918312) internal successors, (21313), 6231 states have internal predecessors, (21313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6232 states to 6232 states and 21313 transitions. [2021-07-09 18:23:55,219 INFO L78 Accepts]: Start accepts. Automaton has 6232 states and 21313 transitions. Word has length 30 [2021-07-09 18:23:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:55,219 INFO L482 AbstractCegarLoop]: Abstraction has 6232 states and 21313 transitions. [2021-07-09 18:23:55,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:23:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6232 states and 21313 transitions. [2021-07-09 18:23:55,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:55,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:55,228 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:55,444 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash -55546536, now seen corresponding path program 51 times [2021-07-09 18:23:55,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:55,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581351009] [2021-07-09 18:23:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:55,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:55,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581351009] [2021-07-09 18:23:55,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581351009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:55,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14150091] [2021-07-09 18:23:55,693 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 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 [2021-07-09 18:23:55,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:23:55,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:23:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:55,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:55,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:55,838 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 19 treesize of output 19 [2021-07-09 18:23:55,839 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:55,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:55,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:55,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:23:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:55,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14150091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:55,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:55,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:23:55,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162313207] [2021-07-09 18:23:55,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:23:55,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:55,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:23:55,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:23:55,908 INFO L87 Difference]: Start difference. First operand 6232 states and 21313 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:23:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:57,849 INFO L93 Difference]: Finished difference Result 8261 states and 27817 transitions. [2021-07-09 18:23:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:23:57,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-07-09 18:23:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:57,867 INFO L225 Difference]: With dead ends: 8261 [2021-07-09 18:23:57,868 INFO L226 Difference]: Without dead ends: 8230 [2021-07-09 18:23:57,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=463, Invalid=3077, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:23:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2021-07-09 18:23:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 6240. [2021-07-09 18:23:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6240 states, 6239 states have (on average 3.4199390928033337) internal successors, (21337), 6239 states have internal predecessors, (21337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6240 states to 6240 states and 21337 transitions. [2021-07-09 18:23:57,987 INFO L78 Accepts]: Start accepts. Automaton has 6240 states and 21337 transitions. Word has length 30 [2021-07-09 18:23:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:57,987 INFO L482 AbstractCegarLoop]: Abstraction has 6240 states and 21337 transitions. [2021-07-09 18:23:57,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:23:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6240 states and 21337 transitions. [2021-07-09 18:23:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:57,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:57,997 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:58,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 18:23:58,198 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:58,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1158696, now seen corresponding path program 52 times [2021-07-09 18:23:58,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:58,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366626967] [2021-07-09 18:23:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:58,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:58,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366626967] [2021-07-09 18:23:58,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366626967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:58,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609771335] [2021-07-09 18:23:58,435 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 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 [2021-07-09 18:23:58,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:23:58,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:58,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:23:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:58,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:58,615 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 19 treesize of output 19 [2021-07-09 18:23:58,616 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:58,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:58,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:58,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:23:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:58,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609771335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:58,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:58,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:23:58,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020053646] [2021-07-09 18:23:58,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:58,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:58,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:58,693 INFO L87 Difference]: Start difference. First operand 6240 states and 21337 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:59,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:59,539 INFO L93 Difference]: Finished difference Result 8082 states and 27204 transitions. [2021-07-09 18:23:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:23:59,539 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:23:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:59,557 INFO L225 Difference]: With dead ends: 8082 [2021-07-09 18:23:59,557 INFO L226 Difference]: Without dead ends: 8057 [2021-07-09 18:23:59,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 650.2ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:23:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-07-09 18:23:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 6248. [2021-07-09 18:23:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 3.4194013126300624) internal successors, (21361), 6247 states have internal predecessors, (21361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 21361 transitions. [2021-07-09 18:23:59,675 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 21361 transitions. Word has length 30 [2021-07-09 18:23:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:59,675 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 21361 transitions. [2021-07-09 18:23:59,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:23:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 21361 transitions. [2021-07-09 18:23:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:23:59,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:59,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:59,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:59,887 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1228760081, now seen corresponding path program 22 times [2021-07-09 18:23:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:59,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542027439] [2021-07-09 18:23:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:00,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:00,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542027439] [2021-07-09 18:24:00,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542027439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:00,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670556325] [2021-07-09 18:24:00,229 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 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 [2021-07-09 18:24:00,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:24:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:00,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:00,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:00,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:00,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:24:00,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:00,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:00,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:00,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:24:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:00,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670556325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:00,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:00,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-07-09 18:24:00,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704983876] [2021-07-09 18:24:00,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:24:00,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:24:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:00,484 INFO L87 Difference]: Start difference. First operand 6248 states and 21361 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-07-09 18:24:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:02,591 INFO L93 Difference]: Finished difference Result 7816 states and 26141 transitions. [2021-07-09 18:24:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:24:02,591 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 30 [2021-07-09 18:24:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:02,607 INFO L225 Difference]: With dead ends: 7816 [2021-07-09 18:24:02,607 INFO L226 Difference]: Without dead ends: 7790 [2021-07-09 18:24:02,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1818.1ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:24:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-07-09 18:24:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6242. [2021-07-09 18:24:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6242 states, 6241 states have (on average 3.4202852107034127) internal successors, (21346), 6241 states have internal predecessors, (21346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6242 states to 6242 states and 21346 transitions. [2021-07-09 18:24:02,718 INFO L78 Accepts]: Start accepts. Automaton has 6242 states and 21346 transitions. Word has length 30 [2021-07-09 18:24:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:02,718 INFO L482 AbstractCegarLoop]: Abstraction has 6242 states and 21346 transitions. [2021-07-09 18:24:02,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-07-09 18:24:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 6242 states and 21346 transitions. [2021-07-09 18:24:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:02,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:02,728 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:02,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-09 18:24:02,928 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:02,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1051720055, now seen corresponding path program 23 times [2021-07-09 18:24:02,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:02,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468269563] [2021-07-09 18:24:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:03,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:03,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468269563] [2021-07-09 18:24:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468269563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:03,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334614572] [2021-07-09 18:24:03,254 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 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 [2021-07-09 18:24:03,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:24:03,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:24:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:03,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:03,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:03,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:24:03,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:03,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:03,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:03,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:24:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:03,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334614572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:03,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:03,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:24:03,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482703006] [2021-07-09 18:24:03,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:24:03,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:24:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:24:03,489 INFO L87 Difference]: Start difference. First operand 6242 states and 21346 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:05,226 INFO L93 Difference]: Finished difference Result 7732 states and 25924 transitions. [2021-07-09 18:24:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:24:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:24:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:05,242 INFO L225 Difference]: With dead ends: 7732 [2021-07-09 18:24:05,242 INFO L226 Difference]: Without dead ends: 7706 [2021-07-09 18:24:05,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1597.5ms TimeCoverageRelationStatistics Valid=529, Invalid=3253, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:24:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-07-09 18:24:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 6254. [2021-07-09 18:24:05,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6254 states, 6253 states have (on average 3.418519110826803) internal successors, (21376), 6253 states have internal predecessors, (21376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6254 states to 6254 states and 21376 transitions. [2021-07-09 18:24:05,351 INFO L78 Accepts]: Start accepts. Automaton has 6254 states and 21376 transitions. Word has length 30 [2021-07-09 18:24:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:05,351 INFO L482 AbstractCegarLoop]: Abstraction has 6254 states and 21376 transitions. [2021-07-09 18:24:05,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 6254 states and 21376 transitions. [2021-07-09 18:24:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:05,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:05,362 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:05,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 18:24:05,564 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1089482637, now seen corresponding path program 24 times [2021-07-09 18:24:05,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:05,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474079426] [2021-07-09 18:24:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:05,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474079426] [2021-07-09 18:24:05,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474079426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616069971] [2021-07-09 18:24:05,882 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 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 [2021-07-09 18:24:05,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:24:05,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:05,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:24:05,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:06,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:06,120 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 29 treesize of output 47 [2021-07-09 18:24:06,126 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:24:06,139 INFO L628 ElimStorePlain]: treesize reduction 28, result has 39.1 percent of original size [2021-07-09 18:24:06,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:06,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:28 [2021-07-09 18:24:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:06,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616069971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:06,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:06,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:24:06,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590484475] [2021-07-09 18:24:06,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:06,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:06,213 INFO L87 Difference]: Start difference. First operand 6254 states and 21376 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:08,726 INFO L93 Difference]: Finished difference Result 8414 states and 28160 transitions. [2021-07-09 18:24:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:24:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:24:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:08,743 INFO L225 Difference]: With dead ends: 8414 [2021-07-09 18:24:08,743 INFO L226 Difference]: Without dead ends: 8388 [2021-07-09 18:24:08,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1914.9ms TimeCoverageRelationStatistics Valid=588, Invalid=3968, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:24:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2021-07-09 18:24:08,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 6316. [2021-07-09 18:24:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6316 states, 6315 states have (on average 3.4134600158353128) internal successors, (21556), 6315 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 21556 transitions. [2021-07-09 18:24:08,848 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 21556 transitions. Word has length 30 [2021-07-09 18:24:08,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:08,848 INFO L482 AbstractCegarLoop]: Abstraction has 6316 states and 21556 transitions. [2021-07-09 18:24:08,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:08,848 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 21556 transitions. [2021-07-09 18:24:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:08,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:08,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:09,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-09 18:24:09,058 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1630768673, now seen corresponding path program 25 times [2021-07-09 18:24:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:09,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544829481] [2021-07-09 18:24:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:09,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:09,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544829481] [2021-07-09 18:24:09,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544829481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:09,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234449227] [2021-07-09 18:24:09,382 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 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 [2021-07-09 18:24:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:24:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:09,641 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-09 18:24:09,641 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-07-09 18:24:09,643 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:09,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:09,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:09,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-07-09 18:24:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:09,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234449227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:09,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:09,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:24:09,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382582105] [2021-07-09 18:24:09,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:09,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:09,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:09,699 INFO L87 Difference]: Start difference. First operand 6316 states and 21556 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:11,682 INFO L93 Difference]: Finished difference Result 7885 states and 26351 transitions. [2021-07-09 18:24:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:24:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:24:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:11,697 INFO L225 Difference]: With dead ends: 7885 [2021-07-09 18:24:11,697 INFO L226 Difference]: Without dead ends: 7859 [2021-07-09 18:24:11,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1781.3ms TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:24:11,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7859 states. [2021-07-09 18:24:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7859 to 6324. [2021-07-09 18:24:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6324 states, 6323 states have (on average 3.4123042859402184) internal successors, (21576), 6323 states have internal predecessors, (21576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6324 states to 6324 states and 21576 transitions. [2021-07-09 18:24:11,798 INFO L78 Accepts]: Start accepts. Automaton has 6324 states and 21576 transitions. Word has length 30 [2021-07-09 18:24:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:11,798 INFO L482 AbstractCegarLoop]: Abstraction has 6324 states and 21576 transitions. [2021-07-09 18:24:11,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 6324 states and 21576 transitions. [2021-07-09 18:24:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:11,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:11,807 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:12,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:12,008 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:12,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:12,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2139112310, now seen corresponding path program 53 times [2021-07-09 18:24:12,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:12,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560280169] [2021-07-09 18:24:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:12,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560280169] [2021-07-09 18:24:12,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560280169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:12,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029974999] [2021-07-09 18:24:12,301 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 [2021-07-09 18:24:12,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:24:12,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:24:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:12,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-09 18:24:12,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:12,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:12,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:12,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:24:12,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:12,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029974999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:12,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:12,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-07-09 18:24:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789874833] [2021-07-09 18:24:12,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:24:12,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:12,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:24:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:24:12,531 INFO L87 Difference]: Start difference. First operand 6324 states and 21576 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-07-09 18:24:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:14,194 INFO L93 Difference]: Finished difference Result 7989 states and 26816 transitions. [2021-07-09 18:24:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:24:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-07-09 18:24:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:14,209 INFO L225 Difference]: With dead ends: 7989 [2021-07-09 18:24:14,209 INFO L226 Difference]: Without dead ends: 7968 [2021-07-09 18:24:14,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1444.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:24:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-07-09 18:24:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 6356. [2021-07-09 18:24:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6356 states, 6355 states have (on average 3.411644374508261) internal successors, (21681), 6355 states have internal predecessors, (21681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:14,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6356 states to 6356 states and 21681 transitions. [2021-07-09 18:24:14,308 INFO L78 Accepts]: Start accepts. Automaton has 6356 states and 21681 transitions. Word has length 30 [2021-07-09 18:24:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:14,308 INFO L482 AbstractCegarLoop]: Abstraction has 6356 states and 21681 transitions. [2021-07-09 18:24:14,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-07-09 18:24:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6356 states and 21681 transitions. [2021-07-09 18:24:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:14,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:14,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:14,518 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1940768934, now seen corresponding path program 54 times [2021-07-09 18:24:14,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956603353] [2021-07-09 18:24:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:14,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:14,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956603353] [2021-07-09 18:24:14,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956603353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:14,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990229134] [2021-07-09 18:24:14,793 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 [2021-07-09 18:24:14,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:24:14,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:24:14,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:14,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:14,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,958 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 19 treesize of output 19 [2021-07-09 18:24:14,959 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:14,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:14,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:14,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:24:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:15,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990229134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:15,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:15,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:24:15,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381978831] [2021-07-09 18:24:15,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:24:15,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:15,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:24:15,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:24:15,012 INFO L87 Difference]: Start difference. First operand 6356 states and 21681 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:17,052 INFO L93 Difference]: Finished difference Result 9388 states and 31190 transitions. [2021-07-09 18:24:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:24:17,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:24:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:17,071 INFO L225 Difference]: With dead ends: 9388 [2021-07-09 18:24:17,071 INFO L226 Difference]: Without dead ends: 9344 [2021-07-09 18:24:17,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1642.3ms TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:24:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9344 states. [2021-07-09 18:24:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9344 to 6373. [2021-07-09 18:24:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.4110169491525424) internal successors, (21735), 6372 states have internal predecessors, (21735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21735 transitions. [2021-07-09 18:24:17,199 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21735 transitions. Word has length 30 [2021-07-09 18:24:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:17,199 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21735 transitions. [2021-07-09 18:24:17,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21735 transitions. [2021-07-09 18:24:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:17,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:17,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:17,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:17,425 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:17,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1538373058, now seen corresponding path program 55 times [2021-07-09 18:24:17,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:17,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330623788] [2021-07-09 18:24:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:17,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:17,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330623788] [2021-07-09 18:24:17,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330623788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:17,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789914613] [2021-07-09 18:24:17,759 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 [2021-07-09 18:24:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:24:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:17,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:17,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:17,928 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 21 treesize of output 19 [2021-07-09 18:24:17,929 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:17,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:17,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:17,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-09 18:24:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:18,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789914613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:18,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:18,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:24:18,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603262646] [2021-07-09 18:24:18,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:24:18,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:18,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:24:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:24:18,010 INFO L87 Difference]: Start difference. First operand 6373 states and 21735 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:24:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:19,572 INFO L93 Difference]: Finished difference Result 8603 states and 28835 transitions. [2021-07-09 18:24:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:24:19,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:24:19,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:19,589 INFO L225 Difference]: With dead ends: 8603 [2021-07-09 18:24:19,589 INFO L226 Difference]: Without dead ends: 8553 [2021-07-09 18:24:19,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1282.9ms TimeCoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:24:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8553 states. [2021-07-09 18:24:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8553 to 6375. [2021-07-09 18:24:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.411201757138375) internal successors, (21743), 6374 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21743 transitions. [2021-07-09 18:24:19,732 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21743 transitions. Word has length 30 [2021-07-09 18:24:19,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:19,732 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21743 transitions. [2021-07-09 18:24:19,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:24:19,732 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21743 transitions. [2021-07-09 18:24:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:19,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:19,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:19,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-09 18:24:19,942 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:19,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1512950702, now seen corresponding path program 56 times [2021-07-09 18:24:19,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:19,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885017552] [2021-07-09 18:24:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:20,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:20,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885017552] [2021-07-09 18:24:20,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885017552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:20,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612424494] [2021-07-09 18:24:20,230 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 [2021-07-09 18:24:20,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:24:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:20,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:20,421 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:20,421 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 19 treesize of output 19 [2021-07-09 18:24:20,423 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:20,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:20,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:20,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:24:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:20,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612424494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:20,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:20,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:24:20,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105691967] [2021-07-09 18:24:20,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:24:20,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:24:20,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:24:20,478 INFO L87 Difference]: Start difference. First operand 6375 states and 21743 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:24:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:21,524 INFO L93 Difference]: Finished difference Result 8550 states and 28635 transitions. [2021-07-09 18:24:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:24:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:24:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:21,540 INFO L225 Difference]: With dead ends: 8550 [2021-07-09 18:24:21,540 INFO L226 Difference]: Without dead ends: 8525 [2021-07-09 18:24:21,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 866.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:24:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-07-09 18:24:21,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 6366. [2021-07-09 18:24:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6366 states, 6365 states have (on average 3.4120974076983503) internal successors, (21718), 6365 states have internal predecessors, (21718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 21718 transitions. [2021-07-09 18:24:21,654 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 21718 transitions. Word has length 30 [2021-07-09 18:24:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:21,654 INFO L482 AbstractCegarLoop]: Abstraction has 6366 states and 21718 transitions. [2021-07-09 18:24:21,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:24:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 21718 transitions. [2021-07-09 18:24:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:21,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:21,663 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:21,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-09 18:24:21,865 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:21,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1366348758, now seen corresponding path program 57 times [2021-07-09 18:24:21,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:21,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434420817] [2021-07-09 18:24:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:22,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:22,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434420817] [2021-07-09 18:24:22,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434420817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:22,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274401008] [2021-07-09 18:24:22,239 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 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 [2021-07-09 18:24:22,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:24:22,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:22,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:24:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:22,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:22,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-07-09 18:24:22,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:22,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:22,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:22,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:274 [2021-07-09 18:24:22,637 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-07-09 18:24:22,883 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-07-09 18:24:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:23,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274401008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:23,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:23,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-09 18:24:23,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662506248] [2021-07-09 18:24:23,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:24:23,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:24:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:23,022 INFO L87 Difference]: Start difference. First operand 6366 states and 21718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:24:24,389 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-07-09 18:24:24,549 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-07-09 18:24:24,880 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-07-09 18:24:25,110 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-09 18:24:25,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:25,399 INFO L93 Difference]: Finished difference Result 8916 states and 29779 transitions. [2021-07-09 18:24:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:24:25,399 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:24:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:25,417 INFO L225 Difference]: With dead ends: 8916 [2021-07-09 18:24:25,417 INFO L226 Difference]: Without dead ends: 8853 [2021-07-09 18:24:25,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2367.7ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:24:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2021-07-09 18:24:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 6375. [2021-07-09 18:24:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6375 states, 6374 states have (on average 3.41214308126765) internal successors, (21749), 6374 states have internal predecessors, (21749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6375 states to 6375 states and 21749 transitions. [2021-07-09 18:24:25,526 INFO L78 Accepts]: Start accepts. Automaton has 6375 states and 21749 transitions. Word has length 30 [2021-07-09 18:24:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:25,526 INFO L482 AbstractCegarLoop]: Abstraction has 6375 states and 21749 transitions. [2021-07-09 18:24:25,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:24:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6375 states and 21749 transitions. [2021-07-09 18:24:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:25,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:25,536 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:25,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:25,737 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 764161106, now seen corresponding path program 58 times [2021-07-09 18:24:25,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:25,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142290623] [2021-07-09 18:24:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:26,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142290623] [2021-07-09 18:24:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142290623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872732010] [2021-07-09 18:24:26,001 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 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 [2021-07-09 18:24:26,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:24:26,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:26,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,181 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 19 treesize of output 19 [2021-07-09 18:24:26,182 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:26,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:26,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:26,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:24:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:26,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872732010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:26,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:26,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-07-09 18:24:26,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298689104] [2021-07-09 18:24:26,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:24:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:24:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:26,258 INFO L87 Difference]: Start difference. First operand 6375 states and 21749 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:24:27,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:27,279 INFO L93 Difference]: Finished difference Result 8258 states and 27729 transitions. [2021-07-09 18:24:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:24:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-07-09 18:24:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:27,295 INFO L225 Difference]: With dead ends: 8258 [2021-07-09 18:24:27,295 INFO L226 Difference]: Without dead ends: 8233 [2021-07-09 18:24:27,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:24:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2021-07-09 18:24:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 6373. [2021-07-09 18:24:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6373 states, 6372 states have (on average 3.412272441933459) internal successors, (21743), 6372 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6373 states to 6373 states and 21743 transitions. [2021-07-09 18:24:27,403 INFO L78 Accepts]: Start accepts. Automaton has 6373 states and 21743 transitions. Word has length 30 [2021-07-09 18:24:27,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:27,403 INFO L482 AbstractCegarLoop]: Abstraction has 6373 states and 21743 transitions. [2021-07-09 18:24:27,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:24:27,403 INFO L276 IsEmpty]: Start isEmpty. Operand 6373 states and 21743 transitions. [2021-07-09 18:24:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:27,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:27,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:27,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:27,616 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -175548318, now seen corresponding path program 59 times [2021-07-09 18:24:27,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:27,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701595200] [2021-07-09 18:24:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:27,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701595200] [2021-07-09 18:24:27,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701595200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579302966] [2021-07-09 18:24:27,921 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 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 [2021-07-09 18:24:27,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:24:27,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:27,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:24:27,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:28,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:28,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-07-09 18:24:28,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:28,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:28,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:28,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:24:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:28,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579302966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:28,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:28,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-07-09 18:24:28,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116828367] [2021-07-09 18:24:28,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:24:28,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:24:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:24:28,161 INFO L87 Difference]: Start difference. First operand 6373 states and 21743 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-07-09 18:24:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:30,475 INFO L93 Difference]: Finished difference Result 8585 states and 28565 transitions. [2021-07-09 18:24:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:24:30,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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 30 [2021-07-09 18:24:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:30,491 INFO L225 Difference]: With dead ends: 8585 [2021-07-09 18:24:30,491 INFO L226 Difference]: Without dead ends: 8570 [2021-07-09 18:24:30,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2019.3ms TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:24:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-07-09 18:24:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 6394. [2021-07-09 18:24:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 3.4135773502268107) internal successors, (21823), 6393 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 21823 transitions. [2021-07-09 18:24:30,596 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 21823 transitions. Word has length 30 [2021-07-09 18:24:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:30,596 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 21823 transitions. [2021-07-09 18:24:30,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 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) [2021-07-09 18:24:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 21823 transitions. [2021-07-09 18:24:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:30,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:30,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:30,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:30,806 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:30,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:30,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1737022281, now seen corresponding path program 26 times [2021-07-09 18:24:30,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:30,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633765530] [2021-07-09 18:24:30,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:31,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:31,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633765530] [2021-07-09 18:24:31,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633765530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:31,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244621960] [2021-07-09 18:24:31,217 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 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 [2021-07-09 18:24:31,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:24:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:24:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:31,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:24:31,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:31,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:31,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:31,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:24:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244621960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:31,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:31,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:24:31,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772790899] [2021-07-09 18:24:31,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:24:31,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:31,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:24:31,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:24:31,564 INFO L87 Difference]: Start difference. First operand 6394 states and 21823 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:36,790 INFO L93 Difference]: Finished difference Result 8768 states and 28896 transitions. [2021-07-09 18:24:36,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-09 18:24:36,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:24:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:36,808 INFO L225 Difference]: With dead ends: 8768 [2021-07-09 18:24:36,808 INFO L226 Difference]: Without dead ends: 8735 [2021-07-09 18:24:36,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3330 ImplicationChecksByTransitivity, 4492.6ms TimeCoverageRelationStatistics Valid=1406, Invalid=8694, Unknown=0, NotChecked=0, Total=10100 [2021-07-09 18:24:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8735 states. [2021-07-09 18:24:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8735 to 6450. [2021-07-09 18:24:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6450 states, 6449 states have (on average 3.4129322375562103) internal successors, (22010), 6449 states have internal predecessors, (22010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6450 states to 6450 states and 22010 transitions. [2021-07-09 18:24:36,924 INFO L78 Accepts]: Start accepts. Automaton has 6450 states and 22010 transitions. Word has length 30 [2021-07-09 18:24:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:36,924 INFO L482 AbstractCegarLoop]: Abstraction has 6450 states and 22010 transitions. [2021-07-09 18:24:36,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 6450 states and 22010 transitions. [2021-07-09 18:24:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:36,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:36,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:37,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:37,134 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1248501593, now seen corresponding path program 27 times [2021-07-09 18:24:37,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:37,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768695899] [2021-07-09 18:24:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:37,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:37,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768695899] [2021-07-09 18:24:37,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768695899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:37,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320253286] [2021-07-09 18:24:37,411 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 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 [2021-07-09 18:24:37,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:24:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:24:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:37,691 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:24:37,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 78 [2021-07-09 18:24:37,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:37,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:37,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:18 [2021-07-09 18:24:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:37,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320253286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:37,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:37,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:24:37,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022834016] [2021-07-09 18:24:37,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:24:37,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:37,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:24:37,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:24:37,790 INFO L87 Difference]: Start difference. First operand 6450 states and 22010 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 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) [2021-07-09 18:24:39,039 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-07-09 18:24:40,127 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-07-09 18:24:40,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:40,865 INFO L93 Difference]: Finished difference Result 10387 states and 34070 transitions. [2021-07-09 18:24:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:24:40,865 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 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 [2021-07-09 18:24:40,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:40,885 INFO L225 Difference]: With dead ends: 10387 [2021-07-09 18:24:40,885 INFO L226 Difference]: Without dead ends: 10372 [2021-07-09 18:24:40,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2469.1ms TimeCoverageRelationStatistics Valid=647, Invalid=4465, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:24:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-07-09 18:24:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 6469. [2021-07-09 18:24:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6468 states have (on average 3.41017316017316) internal successors, (22057), 6468 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 22057 transitions. [2021-07-09 18:24:41,013 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 22057 transitions. Word has length 30 [2021-07-09 18:24:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:41,013 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 22057 transitions. [2021-07-09 18:24:41,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 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) [2021-07-09 18:24:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 22057 transitions. [2021-07-09 18:24:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:41,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:41,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:41,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:41,253 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1869142242, now seen corresponding path program 60 times [2021-07-09 18:24:41,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:41,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143360427] [2021-07-09 18:24:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:41,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:41,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143360427] [2021-07-09 18:24:41,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143360427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:41,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919602991] [2021-07-09 18:24:41,539 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 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 [2021-07-09 18:24:41,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:24:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:24:41,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:41,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:24:41,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:41,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:41,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:41,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:142 [2021-07-09 18:24:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:41,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919602991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:41,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:41,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:24:41,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548293620] [2021-07-09 18:24:41,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:24:41,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:41,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:24:41,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:24:41,962 INFO L87 Difference]: Start difference. First operand 6469 states and 22057 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:44,063 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-07-09 18:24:44,282 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-07-09 18:24:44,512 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-07-09 18:24:44,677 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-07-09 18:24:45,229 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-09 18:24:46,439 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-07-09 18:24:46,572 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-07-09 18:24:46,956 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-09 18:24:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:48,576 INFO L93 Difference]: Finished difference Result 9384 states and 30854 transitions. [2021-07-09 18:24:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-09 18:24:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:24:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:48,593 INFO L225 Difference]: With dead ends: 9384 [2021-07-09 18:24:48,594 INFO L226 Difference]: Without dead ends: 9343 [2021-07-09 18:24:48,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 5785.7ms TimeCoverageRelationStatistics Valid=1325, Invalid=9181, Unknown=0, NotChecked=0, Total=10506 [2021-07-09 18:24:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9343 states. [2021-07-09 18:24:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9343 to 6512. [2021-07-09 18:24:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 3.412225464598372) internal successors, (22217), 6511 states have internal predecessors, (22217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 22217 transitions. [2021-07-09 18:24:48,720 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 22217 transitions. Word has length 30 [2021-07-09 18:24:48,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:48,720 INFO L482 AbstractCegarLoop]: Abstraction has 6512 states and 22217 transitions. [2021-07-09 18:24:48,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 22217 transitions. [2021-07-09 18:24:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:48,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:48,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:48,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:48,931 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash -257494774, now seen corresponding path program 61 times [2021-07-09 18:24:48,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:48,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149143458] [2021-07-09 18:24:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:49,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:49,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149143458] [2021-07-09 18:24:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149143458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:49,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365262629] [2021-07-09 18:24:49,245 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 [2021-07-09 18:24:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:49,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:24:49,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:49,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,427 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 19 treesize of output 19 [2021-07-09 18:24:49,428 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:24:49,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:49,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:49,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:24:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:49,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365262629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:49,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:49,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:24:49,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836344178] [2021-07-09 18:24:49,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:24:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:24:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:24:49,484 INFO L87 Difference]: Start difference. First operand 6512 states and 22217 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:24:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:53,484 INFO L93 Difference]: Finished difference Result 9850 states and 32506 transitions. [2021-07-09 18:24:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:24:53,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:24:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:53,504 INFO L225 Difference]: With dead ends: 9850 [2021-07-09 18:24:53,505 INFO L226 Difference]: Without dead ends: 9812 [2021-07-09 18:24:53,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 3346.8ms TimeCoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:24:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9812 states. [2021-07-09 18:24:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9812 to 6527. [2021-07-09 18:24:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 3.4121973643885997) internal successors, (22268), 6526 states have internal predecessors, (22268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 22268 transitions. [2021-07-09 18:24:53,626 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 22268 transitions. Word has length 30 [2021-07-09 18:24:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:53,627 INFO L482 AbstractCegarLoop]: Abstraction has 6527 states and 22268 transitions. [2021-07-09 18:24:53,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:24:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 22268 transitions. [2021-07-09 18:24:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:53,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:53,636 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:53,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-07-09 18:24:53,837 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1531873319, now seen corresponding path program 28 times [2021-07-09 18:24:53,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:53,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219739841] [2021-07-09 18:24:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:54,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219739841] [2021-07-09 18:24:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219739841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670333923] [2021-07-09 18:24:54,136 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 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 [2021-07-09 18:24:54,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:24:54,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:54,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:24:54,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:54,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:54,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:24:54,335 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 21 treesize of output 11 [2021-07-09 18:24:54,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:24:54,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:54,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:54,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:24:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:54,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670333923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:54,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:54,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-09 18:24:54,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139099146] [2021-07-09 18:24:54,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:54,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:54,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:54,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:54,360 INFO L87 Difference]: Start difference. First operand 6527 states and 22268 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:24:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:24:57,247 INFO L93 Difference]: Finished difference Result 10842 states and 35758 transitions. [2021-07-09 18:24:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:24:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-07-09 18:24:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:24:57,268 INFO L225 Difference]: With dead ends: 10842 [2021-07-09 18:24:57,269 INFO L226 Difference]: Without dead ends: 10821 [2021-07-09 18:24:57,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2265.6ms TimeCoverageRelationStatistics Valid=747, Invalid=4509, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:24:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2021-07-09 18:24:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 6634. [2021-07-09 18:24:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6634 states, 6633 states have (on average 3.4168551183476557) internal successors, (22664), 6633 states have internal predecessors, (22664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:24:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6634 states to 6634 states and 22664 transitions. [2021-07-09 18:24:57,406 INFO L78 Accepts]: Start accepts. Automaton has 6634 states and 22664 transitions. Word has length 30 [2021-07-09 18:24:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:24:57,406 INFO L482 AbstractCegarLoop]: Abstraction has 6634 states and 22664 transitions. [2021-07-09 18:24:57,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:24:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6634 states and 22664 transitions. [2021-07-09 18:24:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:24:57,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:24:57,416 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:24:57,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:24:57,616 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:24:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:24:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash 241234517, now seen corresponding path program 29 times [2021-07-09 18:24:57,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:24:57,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537464108] [2021-07-09 18:24:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:24:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:24:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:57,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:24:57,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537464108] [2021-07-09 18:24:57,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537464108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:57,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991669998] [2021-07-09 18:24:57,886 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 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 [2021-07-09 18:24:57,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:24:57,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:24:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:24:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:24:58,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:24:58,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:58,071 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 21 treesize of output 39 [2021-07-09 18:24:58,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:24:58,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:24:58,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:24:58,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:24:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:24:58,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991669998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:24:58,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:24:58,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-09 18:24:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129462702] [2021-07-09 18:24:58,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:24:58,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:24:58,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:24:58,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:24:58,125 INFO L87 Difference]: Start difference. First operand 6634 states and 22664 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:24:59,181 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-09 18:25:00,807 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-09 18:25:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:02,109 INFO L93 Difference]: Finished difference Result 11958 states and 39090 transitions. [2021-07-09 18:25:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:25:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-07-09 18:25:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:02,133 INFO L225 Difference]: With dead ends: 11958 [2021-07-09 18:25:02,133 INFO L226 Difference]: Without dead ends: 11901 [2021-07-09 18:25:02,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 3375.7ms TimeCoverageRelationStatistics Valid=1317, Invalid=7239, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:25:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11901 states. [2021-07-09 18:25:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11901 to 6665. [2021-07-09 18:25:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6664 states have (on average 3.4191176470588234) internal successors, (22785), 6664 states have internal predecessors, (22785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 22785 transitions. [2021-07-09 18:25:02,293 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 22785 transitions. Word has length 30 [2021-07-09 18:25:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:02,293 INFO L482 AbstractCegarLoop]: Abstraction has 6665 states and 22785 transitions. [2021-07-09 18:25:02,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:25:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 22785 transitions. [2021-07-09 18:25:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:02,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:02,303 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:02,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-07-09 18:25:02,503 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash -49932476, now seen corresponding path program 62 times [2021-07-09 18:25:02,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:02,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909184397] [2021-07-09 18:25:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:02,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:02,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909184397] [2021-07-09 18:25:02,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909184397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:02,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650365226] [2021-07-09 18:25:02,800 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 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 [2021-07-09 18:25:02,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:02,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:25:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:03,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:03,006 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 19 treesize of output 27 [2021-07-09 18:25:03,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:03,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:03,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:03,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:127 [2021-07-09 18:25:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:03,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650365226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:03,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:03,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:25:03,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372102179] [2021-07-09 18:25:03,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:25:03,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:25:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:25:03,160 INFO L87 Difference]: Start difference. First operand 6665 states and 22785 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:06,750 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-07-09 18:25:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:08,245 INFO L93 Difference]: Finished difference Result 9555 states and 31508 transitions. [2021-07-09 18:25:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:25:08,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:08,264 INFO L225 Difference]: With dead ends: 9555 [2021-07-09 18:25:08,264 INFO L226 Difference]: Without dead ends: 9497 [2021-07-09 18:25:08,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 4095.0ms TimeCoverageRelationStatistics Valid=997, Invalid=7745, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:25:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-07-09 18:25:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 6661. [2021-07-09 18:25:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 3.4181681681681684) internal successors, (22765), 6660 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 22765 transitions. [2021-07-09 18:25:08,429 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 22765 transitions. Word has length 30 [2021-07-09 18:25:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:08,429 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 22765 transitions. [2021-07-09 18:25:08,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:08,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 22765 transitions. [2021-07-09 18:25:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:08,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:08,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:08,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-09 18:25:08,640 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1734813122, now seen corresponding path program 63 times [2021-07-09 18:25:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:08,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768702791] [2021-07-09 18:25:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:08,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768702791] [2021-07-09 18:25:08,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768702791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743559587] [2021-07-09 18:25:08,907 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 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 [2021-07-09 18:25:08,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:25:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:25:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:09,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:09,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:09,041 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 19 treesize of output 19 [2021-07-09 18:25:09,042 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:09,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:09,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:09,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:25:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:09,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743559587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:09,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:09,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:25:09,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11164600] [2021-07-09 18:25:09,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:25:09,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:25:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:25:09,106 INFO L87 Difference]: Start difference. First operand 6661 states and 22765 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:12,284 INFO L93 Difference]: Finished difference Result 9025 states and 30264 transitions. [2021-07-09 18:25:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-09 18:25:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:12,302 INFO L225 Difference]: With dead ends: 9025 [2021-07-09 18:25:12,302 INFO L226 Difference]: Without dead ends: 9000 [2021-07-09 18:25:12,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 2537.7ms TimeCoverageRelationStatistics Valid=655, Invalid=4457, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:25:12,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9000 states. [2021-07-09 18:25:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9000 to 6636. [2021-07-09 18:25:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.417633760361718) internal successors, (22676), 6635 states have internal predecessors, (22676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 22676 transitions. [2021-07-09 18:25:12,417 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 22676 transitions. Word has length 30 [2021-07-09 18:25:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:12,417 INFO L482 AbstractCegarLoop]: Abstraction has 6636 states and 22676 transitions. [2021-07-09 18:25:12,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 22676 transitions. [2021-07-09 18:25:12,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:12,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:12,427 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:12,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:12,627 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1517125215, now seen corresponding path program 30 times [2021-07-09 18:25:12,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:12,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218725188] [2021-07-09 18:25:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:13,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:13,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218725188] [2021-07-09 18:25:13,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218725188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:13,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918740395] [2021-07-09 18:25:13,053 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 [2021-07-09 18:25:13,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:25:13,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:13,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:25:13,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:13,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:13,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:13,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:13,263 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 21 treesize of output 39 [2021-07-09 18:25:13,267 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:25:13,286 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-07-09 18:25:13,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:13,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:25:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:13,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918740395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:13,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:13,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:25:13,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025776322] [2021-07-09 18:25:13,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:25:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:25:13,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:25:13,351 INFO L87 Difference]: Start difference. First operand 6636 states and 22676 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:17,215 INFO L93 Difference]: Finished difference Result 9140 states and 30189 transitions. [2021-07-09 18:25:17,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:25:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:17,233 INFO L225 Difference]: With dead ends: 9140 [2021-07-09 18:25:17,233 INFO L226 Difference]: Without dead ends: 9091 [2021-07-09 18:25:17,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 3197.6ms TimeCoverageRelationStatistics Valid=953, Invalid=6529, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:25:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-07-09 18:25:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 6597. [2021-07-09 18:25:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6597 states, 6596 states have (on average 3.4181322013341418) internal successors, (22546), 6596 states have internal predecessors, (22546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:17,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 22546 transitions. [2021-07-09 18:25:17,353 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 22546 transitions. Word has length 30 [2021-07-09 18:25:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:17,353 INFO L482 AbstractCegarLoop]: Abstraction has 6597 states and 22546 transitions. [2021-07-09 18:25:17,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 22546 transitions. [2021-07-09 18:25:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:17,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:17,362 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:17,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:17,569 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1193558822, now seen corresponding path program 64 times [2021-07-09 18:25:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:17,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216078666] [2021-07-09 18:25:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:17,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:17,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216078666] [2021-07-09 18:25:17,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216078666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:17,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275748573] [2021-07-09 18:25:17,838 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 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 [2021-07-09 18:25:17,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:17,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:17,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:25:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:18,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:18,086 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 19 treesize of output 11 [2021-07-09 18:25:18,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:18,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:18,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:18,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:25:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:18,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275748573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:18,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:18,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:25:18,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446005115] [2021-07-09 18:25:18,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:25:18,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:25:18,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:25:18,110 INFO L87 Difference]: Start difference. First operand 6597 states and 22546 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:25:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:20,757 INFO L93 Difference]: Finished difference Result 8362 states and 28087 transitions. [2021-07-09 18:25:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:25:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:25:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:20,773 INFO L225 Difference]: With dead ends: 8362 [2021-07-09 18:25:20,773 INFO L226 Difference]: Without dead ends: 8347 [2021-07-09 18:25:20,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2324.3ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:25:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8347 states. [2021-07-09 18:25:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8347 to 6603. [2021-07-09 18:25:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6603 states, 6602 states have (on average 3.4180551348076342) internal successors, (22566), 6602 states have internal predecessors, (22566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6603 states to 6603 states and 22566 transitions. [2021-07-09 18:25:20,880 INFO L78 Accepts]: Start accepts. Automaton has 6603 states and 22566 transitions. Word has length 30 [2021-07-09 18:25:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:20,880 INFO L482 AbstractCegarLoop]: Abstraction has 6603 states and 22566 transitions. [2021-07-09 18:25:20,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:25:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 6603 states and 22566 transitions. [2021-07-09 18:25:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:20,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:20,889 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:21,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-07-09 18:25:21,090 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash 611989314, now seen corresponding path program 65 times [2021-07-09 18:25:21,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:21,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709336561] [2021-07-09 18:25:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:21,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709336561] [2021-07-09 18:25:21,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709336561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53895532] [2021-07-09 18:25:21,351 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 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 [2021-07-09 18:25:21,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:25:21,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:25:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:21,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:25:21,488 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:21,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:21,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:21,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:25:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:21,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53895532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:21,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:21,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:25:21,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808078135] [2021-07-09 18:25:21,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:25:21,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:25:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:25:21,560 INFO L87 Difference]: Start difference. First operand 6603 states and 22566 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:25,171 INFO L93 Difference]: Finished difference Result 9359 states and 31301 transitions. [2021-07-09 18:25:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:25:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:25,190 INFO L225 Difference]: With dead ends: 9359 [2021-07-09 18:25:25,190 INFO L226 Difference]: Without dead ends: 9312 [2021-07-09 18:25:25,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 3019.0ms TimeCoverageRelationStatistics Valid=790, Invalid=5372, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 18:25:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9312 states. [2021-07-09 18:25:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9312 to 6619. [2021-07-09 18:25:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6619 states, 6618 states have (on average 3.4177999395587793) internal successors, (22619), 6618 states have internal predecessors, (22619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6619 states to 6619 states and 22619 transitions. [2021-07-09 18:25:25,346 INFO L78 Accepts]: Start accepts. Automaton has 6619 states and 22619 transitions. Word has length 30 [2021-07-09 18:25:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:25,346 INFO L482 AbstractCegarLoop]: Abstraction has 6619 states and 22619 transitions. [2021-07-09 18:25:25,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:25,347 INFO L276 IsEmpty]: Start isEmpty. Operand 6619 states and 22619 transitions. [2021-07-09 18:25:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:25,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:25,358 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:25,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-09 18:25:25,558 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1029376390, now seen corresponding path program 66 times [2021-07-09 18:25:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:25,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802553835] [2021-07-09 18:25:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:25,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:25,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802553835] [2021-07-09 18:25:25,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802553835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:25,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081470318] [2021-07-09 18:25:25,817 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 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 [2021-07-09 18:25:25,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:25:25,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:25:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:26,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:26,007 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 19 treesize of output 27 [2021-07-09 18:25:26,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:26,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:26,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:26,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:125 [2021-07-09 18:25:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:26,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081470318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:26,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:26,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:25:26,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85727832] [2021-07-09 18:25:26,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:25:26,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:25:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:25:26,183 INFO L87 Difference]: Start difference. First operand 6619 states and 22619 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:28,327 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-07-09 18:25:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:30,978 INFO L93 Difference]: Finished difference Result 9450 states and 31390 transitions. [2021-07-09 18:25:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:25:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:30,996 INFO L225 Difference]: With dead ends: 9450 [2021-07-09 18:25:30,996 INFO L226 Difference]: Without dead ends: 9389 [2021-07-09 18:25:30,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3948.5ms TimeCoverageRelationStatistics Valid=875, Invalid=6607, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:25:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-07-09 18:25:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 6626. [2021-07-09 18:25:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 3.4176603773584904) internal successors, (22642), 6625 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 22642 transitions. [2021-07-09 18:25:31,115 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 22642 transitions. Word has length 30 [2021-07-09 18:25:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 6626 states and 22642 transitions. [2021-07-09 18:25:31,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 22642 transitions. [2021-07-09 18:25:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:31,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:31,125 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:31,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:31,325 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1086081622, now seen corresponding path program 67 times [2021-07-09 18:25:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:31,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240925295] [2021-07-09 18:25:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:31,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240925295] [2021-07-09 18:25:31,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240925295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345873694] [2021-07-09 18:25:31,567 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 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 [2021-07-09 18:25:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:25:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:31,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:31,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:31,739 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 21 treesize of output 19 [2021-07-09 18:25:31,740 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:25:31,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:31,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:31,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-09 18:25:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:31,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345873694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:31,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:31,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:25:31,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569344326] [2021-07-09 18:25:31,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:25:31,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:25:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:25:31,813 INFO L87 Difference]: Start difference. First operand 6626 states and 22642 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:25:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:33,550 INFO L93 Difference]: Finished difference Result 8651 states and 29045 transitions. [2021-07-09 18:25:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:25:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:25:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:33,567 INFO L225 Difference]: With dead ends: 8651 [2021-07-09 18:25:33,568 INFO L226 Difference]: Without dead ends: 8626 [2021-07-09 18:25:33,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1211.7ms TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:25:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-07-09 18:25:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6640. [2021-07-09 18:25:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6640 states, 6639 states have (on average 3.4181352613345384) internal successors, (22693), 6639 states have internal predecessors, (22693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6640 states to 6640 states and 22693 transitions. [2021-07-09 18:25:33,681 INFO L78 Accepts]: Start accepts. Automaton has 6640 states and 22693 transitions. Word has length 30 [2021-07-09 18:25:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:33,681 INFO L482 AbstractCegarLoop]: Abstraction has 6640 states and 22693 transitions. [2021-07-09 18:25:33,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:25:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6640 states and 22693 transitions. [2021-07-09 18:25:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:33,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:33,691 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:33,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:33,891 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:33,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1576250863, now seen corresponding path program 31 times [2021-07-09 18:25:33,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:33,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846120543] [2021-07-09 18:25:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:34,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846120543] [2021-07-09 18:25:34,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846120543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605898460] [2021-07-09 18:25:34,307 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 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 [2021-07-09 18:25:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:25:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:25:34,499 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 21 treesize of output 11 [2021-07-09 18:25:34,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:25:34,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:34,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:34,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:25:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605898460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:34,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:34,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:25:34,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122972894] [2021-07-09 18:25:34,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:25:34,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:34,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:25:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:25:34,520 INFO L87 Difference]: Start difference. First operand 6640 states and 22693 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:37,855 INFO L93 Difference]: Finished difference Result 8380 states and 27963 transitions. [2021-07-09 18:25:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 18:25:37,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:37,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:37,870 INFO L225 Difference]: With dead ends: 8380 [2021-07-09 18:25:37,870 INFO L226 Difference]: Without dead ends: 8358 [2021-07-09 18:25:37,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 2869.6ms TimeCoverageRelationStatistics Valid=897, Invalid=5909, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 18:25:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-07-09 18:25:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6638. [2021-07-09 18:25:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 3.418411933102305) internal successors, (22688), 6637 states have internal predecessors, (22688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 22688 transitions. [2021-07-09 18:25:37,975 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 22688 transitions. Word has length 30 [2021-07-09 18:25:37,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:37,976 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 22688 transitions. [2021-07-09 18:25:37,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 22688 transitions. [2021-07-09 18:25:37,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:37,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:37,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:38,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-07-09 18:25:38,185 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:38,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1302931307, now seen corresponding path program 32 times [2021-07-09 18:25:38,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:38,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676380785] [2021-07-09 18:25:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:38,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676380785] [2021-07-09 18:25:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676380785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040625580] [2021-07-09 18:25:38,494 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 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 [2021-07-09 18:25:38,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:25:38,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:38,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:25:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:38,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:38,733 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 21 treesize of output 47 [2021-07-09 18:25:38,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:25:38,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:38,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:38,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:20 [2021-07-09 18:25:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:38,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040625580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:38,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:38,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:25:38,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352705280] [2021-07-09 18:25:38,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:25:38,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:38,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:25:38,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:25:38,866 INFO L87 Difference]: Start difference. First operand 6638 states and 22688 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:25:40,982 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-09 18:25:41,627 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-07-09 18:25:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:44,833 INFO L93 Difference]: Finished difference Result 10721 states and 35147 transitions. [2021-07-09 18:25:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:25:44,834 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 [2021-07-09 18:25:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:44,854 INFO L225 Difference]: With dead ends: 10721 [2021-07-09 18:25:44,854 INFO L226 Difference]: Without dead ends: 10673 [2021-07-09 18:25:44,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 4993.8ms TimeCoverageRelationStatistics Valid=1470, Invalid=10740, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:25:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10673 states. [2021-07-09 18:25:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10673 to 6649. [2021-07-09 18:25:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6649 states, 6648 states have (on average 3.417870036101083) internal successors, (22722), 6648 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6649 states to 6649 states and 22722 transitions. [2021-07-09 18:25:45,008 INFO L78 Accepts]: Start accepts. Automaton has 6649 states and 22722 transitions. Word has length 30 [2021-07-09 18:25:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:45,008 INFO L482 AbstractCegarLoop]: Abstraction has 6649 states and 22722 transitions. [2021-07-09 18:25:45,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:25:45,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6649 states and 22722 transitions. [2021-07-09 18:25:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:45,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:45,018 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:45,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:45,219 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash 276275861, now seen corresponding path program 33 times [2021-07-09 18:25:45,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:45,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973928657] [2021-07-09 18:25:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:45,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973928657] [2021-07-09 18:25:45,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973928657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241277954] [2021-07-09 18:25:45,549 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 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 [2021-07-09 18:25:45,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:25:45,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:45,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:25:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:45,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:45,786 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 21 treesize of output 47 [2021-07-09 18:25:45,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:25:45,814 INFO L628 ElimStorePlain]: treesize reduction 45, result has 28.6 percent of original size [2021-07-09 18:25:45,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:45,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:18 [2021-07-09 18:25:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241277954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:45,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:45,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 18:25:45,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374862708] [2021-07-09 18:25:45,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:25:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:25:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:25:45,927 INFO L87 Difference]: Start difference. First operand 6649 states and 22722 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:47,516 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-07-09 18:25:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:49,056 INFO L93 Difference]: Finished difference Result 10431 states and 34548 transitions. [2021-07-09 18:25:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:25:49,057 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:49,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:49,076 INFO L225 Difference]: With dead ends: 10431 [2021-07-09 18:25:49,077 INFO L226 Difference]: Without dead ends: 10368 [2021-07-09 18:25:49,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2804.2ms TimeCoverageRelationStatistics Valid=877, Invalid=5129, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:25:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2021-07-09 18:25:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 6656. [2021-07-09 18:25:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 3.417129977460556) internal successors, (22741), 6655 states have internal predecessors, (22741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 22741 transitions. [2021-07-09 18:25:49,203 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 22741 transitions. Word has length 30 [2021-07-09 18:25:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:49,203 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 22741 transitions. [2021-07-09 18:25:49,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 22741 transitions. [2021-07-09 18:25:49,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:49,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:49,212 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:49,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:25:49,413 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1350859047, now seen corresponding path program 34 times [2021-07-09 18:25:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:49,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855680376] [2021-07-09 18:25:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:49,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:49,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855680376] [2021-07-09 18:25:49,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855680376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:49,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295219526] [2021-07-09 18:25:49,774 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 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 [2021-07-09 18:25:49,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:25:49,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:49,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:25:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:49,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:49,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-09 18:25:49,948 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:25:49,961 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-07-09 18:25:49,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:49,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-07-09 18:25:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:50,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295219526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:50,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:50,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-09 18:25:50,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097074672] [2021-07-09 18:25:50,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:25:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:50,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:25:50,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:25:50,034 INFO L87 Difference]: Start difference. First operand 6656 states and 22741 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-07-09 18:25:51,860 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-07-09 18:25:52,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:52,676 INFO L93 Difference]: Finished difference Result 10017 states and 33312 transitions. [2021-07-09 18:25:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:25:52,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 30 [2021-07-09 18:25:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:52,694 INFO L225 Difference]: With dead ends: 10017 [2021-07-09 18:25:52,694 INFO L226 Difference]: Without dead ends: 9945 [2021-07-09 18:25:52,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 2311.1ms TimeCoverageRelationStatistics Valid=723, Invalid=4107, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:25:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2021-07-09 18:25:52,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 6722. [2021-07-09 18:25:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.41809254575212) internal successors, (22973), 6721 states have internal predecessors, (22973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:52,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22973 transitions. [2021-07-09 18:25:52,821 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22973 transitions. Word has length 30 [2021-07-09 18:25:52,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:52,821 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22973 transitions. [2021-07-09 18:25:52,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2021-07-09 18:25:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22973 transitions. [2021-07-09 18:25:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:52,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:52,830 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:53,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-07-09 18:25:53,031 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:53,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655007, now seen corresponding path program 35 times [2021-07-09 18:25:53,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:53,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689967337] [2021-07-09 18:25:53,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:53,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:53,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689967337] [2021-07-09 18:25:53,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689967337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:53,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796100959] [2021-07-09 18:25:53,423 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 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 [2021-07-09 18:25:53,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:25:53,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:53,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:25:53,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:25:53,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:25:53,693 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-09 18:25:53,693 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 50 [2021-07-09 18:25:53,695 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:53,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:25:53,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:25:53,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-07-09 18:25:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:53,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796100959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:53,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:25:53,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:25:53,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123040334] [2021-07-09 18:25:53,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:25:53,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:25:53,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:25:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:25:53,715 INFO L87 Difference]: Start difference. First operand 6722 states and 22973 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:25:59,175 INFO L93 Difference]: Finished difference Result 8927 states and 29552 transitions. [2021-07-09 18:25:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:25:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:25:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:25:59,192 INFO L225 Difference]: With dead ends: 8927 [2021-07-09 18:25:59,192 INFO L226 Difference]: Without dead ends: 8898 [2021-07-09 18:25:59,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 4399.1ms TimeCoverageRelationStatistics Valid=1157, Invalid=8743, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:25:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-07-09 18:25:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 6748. [2021-07-09 18:25:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6748 states, 6747 states have (on average 3.4179635393508225) internal successors, (23061), 6747 states have internal predecessors, (23061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6748 states to 6748 states and 23061 transitions. [2021-07-09 18:25:59,304 INFO L78 Accepts]: Start accepts. Automaton has 6748 states and 23061 transitions. Word has length 30 [2021-07-09 18:25:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:25:59,304 INFO L482 AbstractCegarLoop]: Abstraction has 6748 states and 23061 transitions. [2021-07-09 18:25:59,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:25:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6748 states and 23061 transitions. [2021-07-09 18:25:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:25:59,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:25:59,314 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:25:59,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-09 18:25:59,515 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:25:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:25:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1871803969, now seen corresponding path program 36 times [2021-07-09 18:25:59,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:25:59,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565862567] [2021-07-09 18:25:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:25:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:25:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:25:59,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:25:59,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565862567] [2021-07-09 18:25:59,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565862567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:25:59,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099723720] [2021-07-09 18:25:59,813 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 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 [2021-07-09 18:25:59,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:25:59,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:25:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:25:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:00,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:00,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:00,128 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 19 treesize of output 43 [2021-07-09 18:26:00,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:26:00,165 INFO L628 ElimStorePlain]: treesize reduction 100, result has 16.7 percent of original size [2021-07-09 18:26:00,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:00,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:20 [2021-07-09 18:26:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:00,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099723720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:00,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:00,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-09 18:26:00,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853325447] [2021-07-09 18:26:00,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:00,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:00,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:00,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:00,272 INFO L87 Difference]: Start difference. First operand 6748 states and 23061 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:26:03,781 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-09 18:26:04,208 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-07-09 18:26:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:07,311 INFO L93 Difference]: Finished difference Result 11440 states and 37396 transitions. [2021-07-09 18:26:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:26:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 [2021-07-09 18:26:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:07,333 INFO L225 Difference]: With dead ends: 11440 [2021-07-09 18:26:07,333 INFO L226 Difference]: Without dead ends: 11377 [2021-07-09 18:26:07,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4941 ImplicationChecksByTransitivity, 5755.5ms TimeCoverageRelationStatistics Valid=1803, Invalid=13203, Unknown=0, NotChecked=0, Total=15006 [2021-07-09 18:26:07,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11377 states. [2021-07-09 18:26:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11377 to 6877. [2021-07-09 18:26:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 3.4157940663176265) internal successors, (23487), 6876 states have internal predecessors, (23487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:07,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 23487 transitions. [2021-07-09 18:26:07,473 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 23487 transitions. Word has length 30 [2021-07-09 18:26:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:07,473 INFO L482 AbstractCegarLoop]: Abstraction has 6877 states and 23487 transitions. [2021-07-09 18:26:07,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:26:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 23487 transitions. [2021-07-09 18:26:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:07,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:07,482 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:07,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 18:26:07,683 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:07,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1119954797, now seen corresponding path program 37 times [2021-07-09 18:26:07,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:07,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532292568] [2021-07-09 18:26:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:08,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532292568] [2021-07-09 18:26:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532292568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872378267] [2021-07-09 18:26:08,063 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 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 [2021-07-09 18:26:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:08,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:26:08,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:08,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:08,354 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 21 treesize of output 11 [2021-07-09 18:26:08,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:08,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:08,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-07-09 18:26:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:08,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872378267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:08,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:08,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:26:08,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624097635] [2021-07-09 18:26:08,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:08,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:08,413 INFO L87 Difference]: Start difference. First operand 6877 states and 23487 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:12,673 INFO L93 Difference]: Finished difference Result 8722 states and 29097 transitions. [2021-07-09 18:26:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:26:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:12,692 INFO L225 Difference]: With dead ends: 8722 [2021-07-09 18:26:12,693 INFO L226 Difference]: Without dead ends: 8696 [2021-07-09 18:26:12,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 3805.5ms TimeCoverageRelationStatistics Valid=874, Invalid=6608, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:26:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8696 states. [2021-07-09 18:26:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8696 to 6874. [2021-07-09 18:26:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-07-09 18:26:12,857 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-07-09 18:26:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:12,857 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-07-09 18:26:12,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-07-09 18:26:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:12,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:12,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:13,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:13,068 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1353770535, now seen corresponding path program 38 times [2021-07-09 18:26:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:13,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991094531] [2021-07-09 18:26:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:13,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991094531] [2021-07-09 18:26:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991094531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:13,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789971940] [2021-07-09 18:26:13,405 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 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 [2021-07-09 18:26:13,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:13,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:26:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:13,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:13,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:13,606 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 21 treesize of output 11 [2021-07-09 18:26:13,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:13,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:13,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:13,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:26:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:13,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789971940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:13,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:13,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:26:13,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171295290] [2021-07-09 18:26:13,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:26:13,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:13,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:26:13,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:26:13,631 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:15,630 INFO L93 Difference]: Finished difference Result 8472 states and 28350 transitions. [2021-07-09 18:26:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:26:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:15,647 INFO L225 Difference]: With dead ends: 8472 [2021-07-09 18:26:15,648 INFO L226 Difference]: Without dead ends: 8446 [2021-07-09 18:26:15,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1740.8ms TimeCoverageRelationStatistics Valid=445, Invalid=2861, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:26:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2021-07-09 18:26:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 6874. [2021-07-09 18:26:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.4156845627819004) internal successors, (23476), 6873 states have internal predecessors, (23476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 23476 transitions. [2021-07-09 18:26:15,769 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 23476 transitions. Word has length 30 [2021-07-09 18:26:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:15,769 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 23476 transitions. [2021-07-09 18:26:15,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 23476 transitions. [2021-07-09 18:26:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:15,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:15,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:15,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-09 18:26:15,981 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash -153504787, now seen corresponding path program 39 times [2021-07-09 18:26:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:15,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821199766] [2021-07-09 18:26:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:16,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821199766] [2021-07-09 18:26:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821199766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090574319] [2021-07-09 18:26:16,286 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 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 [2021-07-09 18:26:16,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:26:16,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:26:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:16,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:16,516 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 21 treesize of output 39 [2021-07-09 18:26:16,520 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:26:16,533 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-07-09 18:26:16,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:16,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-09 18:26:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:16,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090574319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:16,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:16,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:26:16,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876091763] [2021-07-09 18:26:16,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:26:16,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:26:16,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:26:16,579 INFO L87 Difference]: Start difference. First operand 6874 states and 23476 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:18,797 INFO L93 Difference]: Finished difference Result 9020 states and 29936 transitions. [2021-07-09 18:26:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:26:18,798 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:18,818 INFO L225 Difference]: With dead ends: 9020 [2021-07-09 18:26:18,818 INFO L226 Difference]: Without dead ends: 8964 [2021-07-09 18:26:18,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1731.8ms TimeCoverageRelationStatistics Valid=430, Invalid=3230, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:26:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8964 states. [2021-07-09 18:26:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8964 to 6858. [2021-07-09 18:26:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6857 states have (on average 3.41519614991979) internal successors, (23418), 6857 states have internal predecessors, (23418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 23418 transitions. [2021-07-09 18:26:18,936 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 23418 transitions. Word has length 30 [2021-07-09 18:26:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:18,936 INFO L482 AbstractCegarLoop]: Abstraction has 6858 states and 23418 transitions. [2021-07-09 18:26:18,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 23418 transitions. [2021-07-09 18:26:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:18,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:18,946 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:19,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 18:26:19,149 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:19,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:19,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1190293913, now seen corresponding path program 40 times [2021-07-09 18:26:19,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:19,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671715172] [2021-07-09 18:26:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:19,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671715172] [2021-07-09 18:26:19,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671715172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742945067] [2021-07-09 18:26:19,451 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 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 [2021-07-09 18:26:19,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:19,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:26:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:19,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:19,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:19,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:19,675 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 21 treesize of output 11 [2021-07-09 18:26:19,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:19,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:19,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-07-09 18:26:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742945067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:19,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:19,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:26:19,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180335607] [2021-07-09 18:26:19,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:19,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:19,731 INFO L87 Difference]: Start difference. First operand 6858 states and 23418 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:21,244 INFO L93 Difference]: Finished difference Result 8455 states and 28275 transitions. [2021-07-09 18:26:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:26:21,244 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:21,262 INFO L225 Difference]: With dead ends: 8455 [2021-07-09 18:26:21,262 INFO L226 Difference]: Without dead ends: 8440 [2021-07-09 18:26:21,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1341.4ms TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:26:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2021-07-09 18:26:21,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 6848. [2021-07-09 18:26:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6848 states, 6847 states have (on average 3.416532788082372) internal successors, (23393), 6847 states have internal predecessors, (23393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6848 states to 6848 states and 23393 transitions. [2021-07-09 18:26:21,391 INFO L78 Accepts]: Start accepts. Automaton has 6848 states and 23393 transitions. Word has length 30 [2021-07-09 18:26:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:21,391 INFO L482 AbstractCegarLoop]: Abstraction has 6848 states and 23393 transitions. [2021-07-09 18:26:21,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6848 states and 23393 transitions. [2021-07-09 18:26:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:21,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:21,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:21,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:21,617 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1093552081, now seen corresponding path program 41 times [2021-07-09 18:26:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:21,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062831347] [2021-07-09 18:26:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:21,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:21,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062831347] [2021-07-09 18:26:21,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062831347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:21,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813478599] [2021-07-09 18:26:21,962 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 [2021-07-09 18:26:21,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:21,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:26:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:22,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:22,175 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-09 18:26:22,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:26:22,239 INFO L628 ElimStorePlain]: treesize reduction 26, result has 40.9 percent of original size [2021-07-09 18:26:22,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:22,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-09 18:26:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813478599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:22,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:22,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:26:22,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059435531] [2021-07-09 18:26:22,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:26:22,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:26:22,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:22,322 INFO L87 Difference]: Start difference. First operand 6848 states and 23393 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:24,420 INFO L93 Difference]: Finished difference Result 8682 states and 29011 transitions. [2021-07-09 18:26:24,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:26:24,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:24,438 INFO L225 Difference]: With dead ends: 8682 [2021-07-09 18:26:24,438 INFO L226 Difference]: Without dead ends: 8637 [2021-07-09 18:26:24,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1613.9ms TimeCoverageRelationStatistics Valid=350, Invalid=2620, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:26:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-07-09 18:26:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6836. [2021-07-09 18:26:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-07-09 18:26:24,611 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-07-09 18:26:24,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:24,611 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-07-09 18:26:24,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:24,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-07-09 18:26:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:24,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:24,622 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:24,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:24,822 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1107184069, now seen corresponding path program 42 times [2021-07-09 18:26:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:24,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042985889] [2021-07-09 18:26:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:25,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042985889] [2021-07-09 18:26:25,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042985889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011796429] [2021-07-09 18:26:25,152 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 [2021-07-09 18:26:25,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:26:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:25,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:25,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:25,431 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 21 treesize of output 11 [2021-07-09 18:26:25,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:25,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:25,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:25,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:26:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011796429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:25,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:25,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:26:25,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536497826] [2021-07-09 18:26:25,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:26:25,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:25,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:26:25,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:26:25,454 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:26,782 INFO L93 Difference]: Finished difference Result 8350 states and 28001 transitions. [2021-07-09 18:26:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:26:26,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:26,803 INFO L225 Difference]: With dead ends: 8350 [2021-07-09 18:26:26,803 INFO L226 Difference]: Without dead ends: 8335 [2021-07-09 18:26:26,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1188.3ms TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:26:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-07-09 18:26:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 6836. [2021-07-09 18:26:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 3.417556693489393) internal successors, (23359), 6835 states have internal predecessors, (23359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 23359 transitions. [2021-07-09 18:26:26,971 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 23359 transitions. Word has length 30 [2021-07-09 18:26:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:26,971 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 23359 transitions. [2021-07-09 18:26:26,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 23359 transitions. [2021-07-09 18:26:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:26,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:26,982 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:27,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-09 18:26:27,183 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1610082335, now seen corresponding path program 43 times [2021-07-09 18:26:27,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:27,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248445009] [2021-07-09 18:26:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:27,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:27,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248445009] [2021-07-09 18:26:27,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248445009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:27,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270715277] [2021-07-09 18:26:27,616 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 [2021-07-09 18:26:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:27,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:26:27,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:27,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:27,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:27,820 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 21 treesize of output 11 [2021-07-09 18:26:27,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:27,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:27,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:27,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:26:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:27,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270715277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:27,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:27,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:26:27,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443515103] [2021-07-09 18:26:27,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:26:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:27,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:26:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:26:27,843 INFO L87 Difference]: Start difference. First operand 6836 states and 23359 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:32,969 INFO L93 Difference]: Finished difference Result 10075 states and 32916 transitions. [2021-07-09 18:26:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:26:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:32,990 INFO L225 Difference]: With dead ends: 10075 [2021-07-09 18:26:32,990 INFO L226 Difference]: Without dead ends: 10049 [2021-07-09 18:26:32,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3614 ImplicationChecksByTransitivity, 4448.0ms TimeCoverageRelationStatistics Valid=1570, Invalid=8330, Unknown=0, NotChecked=0, Total=9900 [2021-07-09 18:26:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10049 states. [2021-07-09 18:26:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10049 to 6864. [2021-07-09 18:26:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 3.420370100539123) internal successors, (23474), 6863 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 23474 transitions. [2021-07-09 18:26:33,127 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 23474 transitions. Word has length 30 [2021-07-09 18:26:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:33,127 INFO L482 AbstractCegarLoop]: Abstraction has 6864 states and 23474 transitions. [2021-07-09 18:26:33,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 23474 transitions. [2021-07-09 18:26:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:33,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:33,137 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:33,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:33,338 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:33,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2098603023, now seen corresponding path program 44 times [2021-07-09 18:26:33,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:33,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824858089] [2021-07-09 18:26:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:33,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:33,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824858089] [2021-07-09 18:26:33,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824858089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:33,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257615391] [2021-07-09 18:26:33,609 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 [2021-07-09 18:26:33,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:26:33,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:33,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:26:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:33,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:33,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:33,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:26:33,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:26:33,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:33,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:33,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:33,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:3 [2021-07-09 18:26:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:33,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257615391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:33,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:33,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-07-09 18:26:33,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240277784] [2021-07-09 18:26:33,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:26:33,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:33,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:26:33,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:33,871 INFO L87 Difference]: Start difference. First operand 6864 states and 23474 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:26:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:36,040 INFO L93 Difference]: Finished difference Result 11521 states and 37730 transitions. [2021-07-09 18:26:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:26:36,040 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 30 [2021-07-09 18:26:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:36,063 INFO L225 Difference]: With dead ends: 11521 [2021-07-09 18:26:36,063 INFO L226 Difference]: Without dead ends: 11500 [2021-07-09 18:26:36,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1645.3ms TimeCoverageRelationStatistics Valid=665, Invalid=4447, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:26:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11500 states. [2021-07-09 18:26:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11500 to 6890. [2021-07-09 18:26:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6890 states, 6889 states have (on average 3.4235738133255915) internal successors, (23585), 6889 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6890 states to 6890 states and 23585 transitions. [2021-07-09 18:26:36,204 INFO L78 Accepts]: Start accepts. Automaton has 6890 states and 23585 transitions. Word has length 30 [2021-07-09 18:26:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:36,204 INFO L482 AbstractCegarLoop]: Abstraction has 6890 states and 23585 transitions. [2021-07-09 18:26:36,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2021-07-09 18:26:36,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6890 states and 23585 transitions. [2021-07-09 18:26:36,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:36,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:36,214 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:36,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:26:36,415 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash 2044173309, now seen corresponding path program 45 times [2021-07-09 18:26:36,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:36,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895715480] [2021-07-09 18:26:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:36,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:36,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895715480] [2021-07-09 18:26:36,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895715480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:36,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159920628] [2021-07-09 18:26:36,695 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 [2021-07-09 18:26:36,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:26:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:26:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:36,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:36,905 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:26:36,905 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 68 [2021-07-09 18:26:36,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:26:36,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:36,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:36,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:15 [2021-07-09 18:26:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:36,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159920628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:36,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-09 18:26:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474883454] [2021-07-09 18:26:36,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:26:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:36,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:26:36,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:36,955 INFO L87 Difference]: Start difference. First operand 6890 states and 23585 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:38,262 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 18:26:41,832 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-09 18:26:42,041 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-07-09 18:26:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:42,528 INFO L93 Difference]: Finished difference Result 11048 states and 36381 transitions. [2021-07-09 18:26:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-07-09 18:26:42,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:42,549 INFO L225 Difference]: With dead ends: 11048 [2021-07-09 18:26:42,549 INFO L226 Difference]: Without dead ends: 10971 [2021-07-09 18:26:42,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 4205.5ms TimeCoverageRelationStatistics Valid=1535, Invalid=9385, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 18:26:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-07-09 18:26:42,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 7036. [2021-07-09 18:26:42,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.4169154228855723) internal successors, (24038), 7035 states have internal predecessors, (24038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 24038 transitions. [2021-07-09 18:26:42,689 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 24038 transitions. Word has length 30 [2021-07-09 18:26:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:42,689 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 24038 transitions. [2021-07-09 18:26:42,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 24038 transitions. [2021-07-09 18:26:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:42,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:42,700 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:42,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-09 18:26:42,900 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2029573961, now seen corresponding path program 46 times [2021-07-09 18:26:42,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:42,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493826477] [2021-07-09 18:26:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:43,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493826477] [2021-07-09 18:26:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493826477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910095778] [2021-07-09 18:26:43,288 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 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 [2021-07-09 18:26:43,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:26:43,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:43,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:26:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:43,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:43,562 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-09 18:26:43,563 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 86 treesize of output 58 [2021-07-09 18:26:43,564 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:43,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:43,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:43,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:89, output treesize:13 [2021-07-09 18:26:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:43,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910095778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:43,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:43,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:26:43,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908914151] [2021-07-09 18:26:43,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:26:43,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:26:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:26:43,622 INFO L87 Difference]: Start difference. First operand 7036 states and 24038 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:46,549 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-07-09 18:26:46,749 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-09 18:26:47,320 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-07-09 18:26:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:48,761 INFO L93 Difference]: Finished difference Result 9538 states and 31634 transitions. [2021-07-09 18:26:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:26:48,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:48,787 INFO L225 Difference]: With dead ends: 9538 [2021-07-09 18:26:48,787 INFO L226 Difference]: Without dead ends: 9523 [2021-07-09 18:26:48,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4398.2ms TimeCoverageRelationStatistics Valid=981, Invalid=6675, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:26:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-07-09 18:26:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 7037. [2021-07-09 18:26:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7037 states, 7036 states have (on average 3.417140420693576) internal successors, (24043), 7036 states have internal predecessors, (24043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7037 states to 7037 states and 24043 transitions. [2021-07-09 18:26:48,913 INFO L78 Accepts]: Start accepts. Automaton has 7037 states and 24043 transitions. Word has length 30 [2021-07-09 18:26:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:48,913 INFO L482 AbstractCegarLoop]: Abstraction has 7037 states and 24043 transitions. [2021-07-09 18:26:48,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7037 states and 24043 transitions. [2021-07-09 18:26:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:48,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:48,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:49,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-09 18:26:49,124 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:49,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1541053273, now seen corresponding path program 47 times [2021-07-09 18:26:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:49,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750404090] [2021-07-09 18:26:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:49,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:49,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750404090] [2021-07-09 18:26:49,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750404090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:49,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612326259] [2021-07-09 18:26:49,418 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 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 [2021-07-09 18:26:49,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:26:49,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:49,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:26:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:49,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:49,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:49,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:49,646 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 21 treesize of output 37 [2021-07-09 18:26:49,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:49,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:49,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:49,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-07-09 18:26:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:49,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612326259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:49,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:49,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-07-09 18:26:49,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406284771] [2021-07-09 18:26:49,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:26:49,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:26:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:26:49,704 INFO L87 Difference]: Start difference. First operand 7037 states and 24043 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:26:55,825 INFO L93 Difference]: Finished difference Result 12819 states and 41403 transitions. [2021-07-09 18:26:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:26:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:26:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:26:55,887 INFO L225 Difference]: With dead ends: 12819 [2021-07-09 18:26:55,887 INFO L226 Difference]: Without dead ends: 12789 [2021-07-09 18:26:55,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 4960.3ms TimeCoverageRelationStatistics Valid=1803, Invalid=10853, Unknown=0, NotChecked=0, Total=12656 [2021-07-09 18:26:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12789 states. [2021-07-09 18:26:56,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12789 to 7083. [2021-07-09 18:26:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.415419373058458) internal successors, (24188), 7082 states have internal predecessors, (24188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 24188 transitions. [2021-07-09 18:26:56,027 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 24188 transitions. Word has length 30 [2021-07-09 18:26:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:26:56,028 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 24188 transitions. [2021-07-09 18:26:56,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:26:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 24188 transitions. [2021-07-09 18:26:56,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:26:56,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:26:56,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:26:56,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-09 18:26:56,238 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:26:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:26:56,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1282297551, now seen corresponding path program 48 times [2021-07-09 18:26:56,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:26:56,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927322] [2021-07-09 18:26:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:26:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:26:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:56,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:26:56,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927322] [2021-07-09 18:26:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:56,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793127563] [2021-07-09 18:26:56,683 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 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 [2021-07-09 18:26:56,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:26:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:26:56,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:26:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:26:56,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:56,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:26:56,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:56,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-09 18:26:56,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:26:56,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:26:56,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:26:56,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-07-09 18:26:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:26:57,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793127563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:26:57,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:26:57,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:26:57,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822244835] [2021-07-09 18:26:57,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:26:57,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:26:57,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:26:57,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:26:57,049 INFO L87 Difference]: Start difference. First operand 7083 states and 24188 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:27:00,005 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:27:00,199 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-09 18:27:00,682 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-07-09 18:27:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:01,844 INFO L93 Difference]: Finished difference Result 9072 states and 30203 transitions. [2021-07-09 18:27:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:27:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 [2021-07-09 18:27:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:01,861 INFO L225 Difference]: With dead ends: 9072 [2021-07-09 18:27:01,861 INFO L226 Difference]: Without dead ends: 9057 [2021-07-09 18:27:01,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4232.2ms TimeCoverageRelationStatistics Valid=889, Invalid=6767, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:27:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-07-09 18:27:01,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7074. [2021-07-09 18:27:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.4155238229888307) internal successors, (24158), 7073 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 24158 transitions. [2021-07-09 18:27:01,979 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 24158 transitions. Word has length 30 [2021-07-09 18:27:01,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:01,979 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 24158 transitions. [2021-07-09 18:27:01,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) [2021-07-09 18:27:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 24158 transitions. [2021-07-09 18:27:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:01,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:01,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:02,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:02,190 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash 499662597, now seen corresponding path program 49 times [2021-07-09 18:27:02,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:02,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879340344] [2021-07-09 18:27:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:02,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:02,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879340344] [2021-07-09 18:27:02,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879340344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:02,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67457088] [2021-07-09 18:27:02,543 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 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 [2021-07-09 18:27:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:02,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:27:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:02,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:02,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:02,719 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 21 treesize of output 11 [2021-07-09 18:27:02,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:02,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:02,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:02,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:27:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67457088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:02,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:02,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:27:02,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906405145] [2021-07-09 18:27:02,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:02,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:02,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:02,744 INFO L87 Difference]: Start difference. First operand 7074 states and 24158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:05,160 INFO L93 Difference]: Finished difference Result 8621 states and 28929 transitions. [2021-07-09 18:27:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:27:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:27:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:05,178 INFO L225 Difference]: With dead ends: 8621 [2021-07-09 18:27:05,178 INFO L226 Difference]: Without dead ends: 8595 [2021-07-09 18:27:05,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2045.0ms TimeCoverageRelationStatistics Valid=502, Invalid=3404, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:27:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8595 states. [2021-07-09 18:27:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8595 to 7060. [2021-07-09 18:27:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 3.417339566510837) internal successors, (24123), 7059 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 24123 transitions. [2021-07-09 18:27:05,319 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 24123 transitions. Word has length 30 [2021-07-09 18:27:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:05,319 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 24123 transitions. [2021-07-09 18:27:05,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 24123 transitions. [2021-07-09 18:27:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:05,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:05,331 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:05,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:05,531 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:05,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1728681022, now seen corresponding path program 68 times [2021-07-09 18:27:05,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:05,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352348996] [2021-07-09 18:27:05,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:05,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352348996] [2021-07-09 18:27:05,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352348996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:05,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048018793] [2021-07-09 18:27:05,670 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 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 [2021-07-09 18:27:05,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:05,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:05,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:27:05,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:05,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:05,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:27:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:05,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048018793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:05,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:05,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814741567] [2021-07-09 18:27:05,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:05,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:05,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:05,922 INFO L87 Difference]: Start difference. First operand 7060 states and 24123 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:06,767 INFO L93 Difference]: Finished difference Result 8380 states and 27726 transitions. [2021-07-09 18:27:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:27:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:27:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:06,784 INFO L225 Difference]: With dead ends: 8380 [2021-07-09 18:27:06,784 INFO L226 Difference]: Without dead ends: 8365 [2021-07-09 18:27:06,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 649.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:27:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-07-09 18:27:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 7072. [2021-07-09 18:27:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 3.4171970018384954) internal successors, (24163), 7071 states have internal predecessors, (24163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 24163 transitions. [2021-07-09 18:27:06,906 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 24163 transitions. Word has length 30 [2021-07-09 18:27:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:06,906 INFO L482 AbstractCegarLoop]: Abstraction has 7072 states and 24163 transitions. [2021-07-09 18:27:06,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 24163 transitions. [2021-07-09 18:27:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:06,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:06,917 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:07,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-09 18:27:07,117 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash -691888966, now seen corresponding path program 69 times [2021-07-09 18:27:07,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:07,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086411574] [2021-07-09 18:27:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:07,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086411574] [2021-07-09 18:27:07,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086411574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:07,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748803545] [2021-07-09 18:27:07,262 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 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 [2021-07-09 18:27:07,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:27:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:07,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:27:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:07,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:07,590 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 19 treesize of output 11 [2021-07-09 18:27:07,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:07,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:07,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:07,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-09 18:27:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:07,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748803545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:07,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:07,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:07,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973490300] [2021-07-09 18:27:07,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:07,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:07,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:07,615 INFO L87 Difference]: Start difference. First operand 7072 states and 24163 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:08,601 INFO L93 Difference]: Finished difference Result 8309 states and 27513 transitions. [2021-07-09 18:27:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:27:08,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:27:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:08,617 INFO L225 Difference]: With dead ends: 8309 [2021-07-09 18:27:08,617 INFO L226 Difference]: Without dead ends: 8279 [2021-07-09 18:27:08,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 770.2ms TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:27:08,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8279 states. [2021-07-09 18:27:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8279 to 7064. [2021-07-09 18:27:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 7063 states have (on average 3.4176695455189012) internal successors, (24139), 7063 states have internal predecessors, (24139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 24139 transitions. [2021-07-09 18:27:08,737 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 24139 transitions. Word has length 30 [2021-07-09 18:27:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:08,737 INFO L482 AbstractCegarLoop]: Abstraction has 7064 states and 24139 transitions. [2021-07-09 18:27:08,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 24139 transitions. [2021-07-09 18:27:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:08,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:08,748 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:08,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 18:27:08,949 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 682939496, now seen corresponding path program 70 times [2021-07-09 18:27:08,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:08,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398637038] [2021-07-09 18:27:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:09,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:09,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398637038] [2021-07-09 18:27:09,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398637038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:09,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77644950] [2021-07-09 18:27:09,101 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 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 [2021-07-09 18:27:09,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:09,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:09,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:09,296 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 19 treesize of output 19 [2021-07-09 18:27:09,297 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:09,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:09,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:09,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:27:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:09,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77644950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:09,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:09,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:09,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974938705] [2021-07-09 18:27:09,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:09,346 INFO L87 Difference]: Start difference. First operand 7064 states and 24139 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:11,778 INFO L93 Difference]: Finished difference Result 13253 states and 43828 transitions. [2021-07-09 18:27:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:27:11,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:27:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:11,809 INFO L225 Difference]: With dead ends: 13253 [2021-07-09 18:27:11,809 INFO L226 Difference]: Without dead ends: 13223 [2021-07-09 18:27:11,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=663, Invalid=3759, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:27:11,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13223 states. [2021-07-09 18:27:11,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 7065. [2021-07-09 18:27:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7065 states, 7064 states have (on average 3.4173272933182335) internal successors, (24140), 7064 states have internal predecessors, (24140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7065 states to 7065 states and 24140 transitions. [2021-07-09 18:27:12,003 INFO L78 Accepts]: Start accepts. Automaton has 7065 states and 24140 transitions. Word has length 30 [2021-07-09 18:27:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:12,003 INFO L482 AbstractCegarLoop]: Abstraction has 7065 states and 24140 transitions. [2021-07-09 18:27:12,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 7065 states and 24140 transitions. [2021-07-09 18:27:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:12,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:12,015 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:12,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-07-09 18:27:12,215 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:12,216 INFO L82 PathProgramCache]: Analyzing trace with hash -8608016, now seen corresponding path program 71 times [2021-07-09 18:27:12,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:12,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532140277] [2021-07-09 18:27:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:12,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532140277] [2021-07-09 18:27:12,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532140277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:12,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383598060] [2021-07-09 18:27:12,362 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 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 [2021-07-09 18:27:12,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:27:12,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:12,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:12,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:12,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:27:12,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:12,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:12,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:27:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383598060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:12,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:12,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:12,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81637065] [2021-07-09 18:27:12,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:12,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:12,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:12,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:12,615 INFO L87 Difference]: Start difference. First operand 7065 states and 24140 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:13,470 INFO L93 Difference]: Finished difference Result 8952 states and 29987 transitions. [2021-07-09 18:27:13,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:27:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:27:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:13,489 INFO L225 Difference]: With dead ends: 8952 [2021-07-09 18:27:13,489 INFO L226 Difference]: Without dead ends: 8937 [2021-07-09 18:27:13,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:27:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2021-07-09 18:27:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 7070. [2021-07-09 18:27:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.417032112038478) internal successors, (24155), 7069 states have internal predecessors, (24155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:13,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 24155 transitions. [2021-07-09 18:27:13,618 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 24155 transitions. Word has length 30 [2021-07-09 18:27:13,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:13,618 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 24155 transitions. [2021-07-09 18:27:13,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 24155 transitions. [2021-07-09 18:27:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:13,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:13,629 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:13,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-07-09 18:27:13,830 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1865789292, now seen corresponding path program 72 times [2021-07-09 18:27:13,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:13,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709509141] [2021-07-09 18:27:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:13,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709509141] [2021-07-09 18:27:13,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709509141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571024240] [2021-07-09 18:27:13,966 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 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 [2021-07-09 18:27:13,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:27:13,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:27:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:14,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:14,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:14,179 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 23 treesize of output 23 [2021-07-09 18:27:14,180 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:14,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:14,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:14,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:27:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:14,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571024240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:14,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:14,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:27:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763372240] [2021-07-09 18:27:14,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:27:14,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:27:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:27:14,243 INFO L87 Difference]: Start difference. First operand 7070 states and 24155 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) [2021-07-09 18:27:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:15,849 INFO L93 Difference]: Finished difference Result 9351 states and 31228 transitions. [2021-07-09 18:27:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:27:15,849 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 30 [2021-07-09 18:27:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:15,868 INFO L225 Difference]: With dead ends: 9351 [2021-07-09 18:27:15,868 INFO L226 Difference]: Without dead ends: 9316 [2021-07-09 18:27:15,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:27:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9316 states. [2021-07-09 18:27:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9316 to 7069. [2021-07-09 18:27:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-07-09 18:27:16,001 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-07-09 18:27:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:16,001 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-07-09 18:27:16,001 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) [2021-07-09 18:27:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-07-09 18:27:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:16,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:16,012 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:16,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-09 18:27:16,213 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:16,213 INFO L82 PathProgramCache]: Analyzing trace with hash -43636904, now seen corresponding path program 73 times [2021-07-09 18:27:16,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:16,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964496280] [2021-07-09 18:27:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:16,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:16,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964496280] [2021-07-09 18:27:16,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964496280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:16,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30927505] [2021-07-09 18:27:16,368 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 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 [2021-07-09 18:27:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:16,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:16,639 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:27:16,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:16,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:16,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:27:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:16,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30927505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:16,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:16,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:16,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133469065] [2021-07-09 18:27:16,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:16,663 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:17,800 INFO L93 Difference]: Finished difference Result 9314 states and 31182 transitions. [2021-07-09 18:27:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:27:17,800 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:27:17,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:17,823 INFO L225 Difference]: With dead ends: 9314 [2021-07-09 18:27:17,823 INFO L226 Difference]: Without dead ends: 9299 [2021-07-09 18:27:17,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 951.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:27:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9299 states. [2021-07-09 18:27:17,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9299 to 7071. [2021-07-09 18:27:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.4164073550212164) internal successors, (24154), 7070 states have internal predecessors, (24154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 24154 transitions. [2021-07-09 18:27:17,956 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 24154 transitions. Word has length 30 [2021-07-09 18:27:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:17,956 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 24154 transitions. [2021-07-09 18:27:17,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 24154 transitions. [2021-07-09 18:27:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:17,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:17,967 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:18,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:18,167 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:18,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:18,168 INFO L82 PathProgramCache]: Analyzing trace with hash 154706472, now seen corresponding path program 74 times [2021-07-09 18:27:18,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:18,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368427642] [2021-07-09 18:27:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:18,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368427642] [2021-07-09 18:27:18,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368427642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044717223] [2021-07-09 18:27:18,308 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 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 [2021-07-09 18:27:18,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:18,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:18,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 27 [2021-07-09 18:27:18,530 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:18,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:18,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:18,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:23 [2021-07-09 18:27:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:18,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044717223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:18,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:18,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:18,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506589095] [2021-07-09 18:27:18,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:18,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:18,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:18,582 INFO L87 Difference]: Start difference. First operand 7071 states and 24154 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:27:20,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:20,252 INFO L93 Difference]: Finished difference Result 9796 states and 32685 transitions. [2021-07-09 18:27:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:27:20,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:27:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:20,273 INFO L225 Difference]: With dead ends: 9796 [2021-07-09 18:27:20,273 INFO L226 Difference]: Without dead ends: 9781 [2021-07-09 18:27:20,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1225.1ms TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:27:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-07-09 18:27:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 7069. [2021-07-09 18:27:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7069 states, 7068 states have (on average 3.4161007357102435) internal successors, (24145), 7068 states have internal predecessors, (24145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7069 states to 7069 states and 24145 transitions. [2021-07-09 18:27:20,419 INFO L78 Accepts]: Start accepts. Automaton has 7069 states and 24145 transitions. Word has length 30 [2021-07-09 18:27:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:20,419 INFO L482 AbstractCegarLoop]: Abstraction has 7069 states and 24145 transitions. [2021-07-09 18:27:20,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:27:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7069 states and 24145 transitions. [2021-07-09 18:27:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:20,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:20,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:20,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-07-09 18:27:20,631 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:20,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1280772920, now seen corresponding path program 75 times [2021-07-09 18:27:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:20,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333500972] [2021-07-09 18:27:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:20,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333500972] [2021-07-09 18:27:20,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333500972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873202396] [2021-07-09 18:27:20,785 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 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 [2021-07-09 18:27:20,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:27:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:20,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:21,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:21,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:27:21,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:21,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:21,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:21,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-09 18:27:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873202396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:21,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:21,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:21,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649480189] [2021-07-09 18:27:21,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:21,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:21,092 INFO L87 Difference]: Start difference. First operand 7069 states and 24145 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:27:22,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:22,652 INFO L93 Difference]: Finished difference Result 11687 states and 38279 transitions. [2021-07-09 18:27:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:27:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-09 18:27:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:22,677 INFO L225 Difference]: With dead ends: 11687 [2021-07-09 18:27:22,678 INFO L226 Difference]: Without dead ends: 11666 [2021-07-09 18:27:22,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:27:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11666 states. [2021-07-09 18:27:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11666 to 7054. [2021-07-09 18:27:22,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.4162767616617042) internal successors, (24095), 7053 states have internal predecessors, (24095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 24095 transitions. [2021-07-09 18:27:22,824 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 24095 transitions. Word has length 30 [2021-07-09 18:27:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:22,824 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 24095 transitions. [2021-07-09 18:27:22,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:27:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 24095 transitions. [2021-07-09 18:27:22,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:22,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:22,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:23,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-09 18:27:23,036 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:23,036 INFO L82 PathProgramCache]: Analyzing trace with hash -575656810, now seen corresponding path program 76 times [2021-07-09 18:27:23,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:23,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619969718] [2021-07-09 18:27:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:23,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619969718] [2021-07-09 18:27:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619969718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317170204] [2021-07-09 18:27:23,188 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 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 [2021-07-09 18:27:23,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:23,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:23,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:23,522 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-09 18:27:23,522 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 56 [2021-07-09 18:27:23,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:23,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:23,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:23,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:3 [2021-07-09 18:27:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:23,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317170204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:23,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:23,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605956630] [2021-07-09 18:27:23,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:23,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:23,550 INFO L87 Difference]: Start difference. First operand 7054 states and 24095 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:27:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:24,927 INFO L93 Difference]: Finished difference Result 10880 states and 36101 transitions. [2021-07-09 18:27:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:27:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-09 18:27:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:24,951 INFO L225 Difference]: With dead ends: 10880 [2021-07-09 18:27:24,951 INFO L226 Difference]: Without dead ends: 10859 [2021-07-09 18:27:24,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:27:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2021-07-09 18:27:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 7061. [2021-07-09 18:27:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7061 states, 7060 states have (on average 3.41685552407932) internal successors, (24123), 7060 states have internal predecessors, (24123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7061 states to 7061 states and 24123 transitions. [2021-07-09 18:27:25,089 INFO L78 Accepts]: Start accepts. Automaton has 7061 states and 24123 transitions. Word has length 30 [2021-07-09 18:27:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:25,089 INFO L482 AbstractCegarLoop]: Abstraction has 7061 states and 24123 transitions. [2021-07-09 18:27:25,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:27:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7061 states and 24123 transitions. [2021-07-09 18:27:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:25,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:25,101 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:25,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 18:27:25,317 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1197451026, now seen corresponding path program 77 times [2021-07-09 18:27:25,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:25,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551433061] [2021-07-09 18:27:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:25,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:25,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551433061] [2021-07-09 18:27:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551433061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:25,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258497880] [2021-07-09 18:27:25,477 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 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 [2021-07-09 18:27:25,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:27:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:25,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:25,730 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 19 treesize of output 19 [2021-07-09 18:27:25,731 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:25,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:25,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:25,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:27:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:25,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258497880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:25,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:25,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:27:25,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848479531] [2021-07-09 18:27:25,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:27:25,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:25,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:27:25,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:27:25,781 INFO L87 Difference]: Start difference. First operand 7061 states and 24123 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-07-09 18:27:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:27,860 INFO L93 Difference]: Finished difference Result 11290 states and 37387 transitions. [2021-07-09 18:27:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:27:27,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 30 [2021-07-09 18:27:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:27,883 INFO L225 Difference]: With dead ends: 11290 [2021-07-09 18:27:27,883 INFO L226 Difference]: Without dead ends: 11254 [2021-07-09 18:27:27,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 1461.3ms TimeCoverageRelationStatistics Valid=553, Invalid=3353, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:27:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11254 states. [2021-07-09 18:27:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11254 to 7068. [2021-07-09 18:27:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.4184236592613555) internal successors, (24158), 7067 states have internal predecessors, (24158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 24158 transitions. [2021-07-09 18:27:28,040 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 24158 transitions. Word has length 30 [2021-07-09 18:27:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:28,040 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 24158 transitions. [2021-07-09 18:27:28,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-07-09 18:27:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 24158 transitions. [2021-07-09 18:27:28,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:28,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:28,051 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:28,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-09 18:27:28,251 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:28,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:28,251 INFO L82 PathProgramCache]: Analyzing trace with hash 479008484, now seen corresponding path program 78 times [2021-07-09 18:27:28,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:28,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25128150] [2021-07-09 18:27:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:28,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:28,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25128150] [2021-07-09 18:27:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25128150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:28,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291099655] [2021-07-09 18:27:28,409 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 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 [2021-07-09 18:27:28,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:27:28,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:28,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:28,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:28,610 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 19 treesize of output 19 [2021-07-09 18:27:28,611 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:28,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:28,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:28,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:27:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:28,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291099655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:28,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:28,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:28,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661154627] [2021-07-09 18:27:28,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:28,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:28,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:28,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:28,665 INFO L87 Difference]: Start difference. First operand 7068 states and 24158 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:30,391 INFO L93 Difference]: Finished difference Result 11632 states and 38612 transitions. [2021-07-09 18:27:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:27:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:27:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:30,414 INFO L225 Difference]: With dead ends: 11632 [2021-07-09 18:27:30,415 INFO L226 Difference]: Without dead ends: 11582 [2021-07-09 18:27:30,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 976.2ms TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:27:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11582 states. [2021-07-09 18:27:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11582 to 7063. [2021-07-09 18:27:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7062 states have (on average 3.4170206740300197) internal successors, (24131), 7062 states have internal predecessors, (24131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 24131 transitions. [2021-07-09 18:27:30,562 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 24131 transitions. Word has length 30 [2021-07-09 18:27:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:30,562 INFO L482 AbstractCegarLoop]: Abstraction has 7063 states and 24131 transitions. [2021-07-09 18:27:30,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 24131 transitions. [2021-07-09 18:27:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:30,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:30,573 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:30,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-07-09 18:27:30,774 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:30,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:30,774 INFO L82 PathProgramCache]: Analyzing trace with hash -327230800, now seen corresponding path program 79 times [2021-07-09 18:27:30,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:30,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530733723] [2021-07-09 18:27:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:30,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530733723] [2021-07-09 18:27:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530733723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745465319] [2021-07-09 18:27:30,951 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 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 [2021-07-09 18:27:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:30,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:30,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:31,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:31,150 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 19 treesize of output 19 [2021-07-09 18:27:31,154 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:31,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:31,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:31,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:27:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745465319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:31,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:31,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:31,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412884952] [2021-07-09 18:27:31,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:31,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:31,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:31,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:31,204 INFO L87 Difference]: Start difference. First operand 7063 states and 24131 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:32,393 INFO L93 Difference]: Finished difference Result 11229 states and 37406 transitions. [2021-07-09 18:27:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:27:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:27:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:32,450 INFO L225 Difference]: With dead ends: 11229 [2021-07-09 18:27:32,450 INFO L226 Difference]: Without dead ends: 11179 [2021-07-09 18:27:32,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:27:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-07-09 18:27:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 7078. [2021-07-09 18:27:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 3.4183976261127595) internal successors, (24192), 7077 states have internal predecessors, (24192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 24192 transitions. [2021-07-09 18:27:32,584 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 24192 transitions. Word has length 30 [2021-07-09 18:27:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:32,584 INFO L482 AbstractCegarLoop]: Abstraction has 7078 states and 24192 transitions. [2021-07-09 18:27:32,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 24192 transitions. [2021-07-09 18:27:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:32,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:32,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:32,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:32,795 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:32,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1558548792, now seen corresponding path program 80 times [2021-07-09 18:27:32,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:32,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026520479] [2021-07-09 18:27:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:32,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:32,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026520479] [2021-07-09 18:27:32,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026520479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:32,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998263126] [2021-07-09 18:27:32,983 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 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 [2021-07-09 18:27:33,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:33,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:33,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:33,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,173 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 29 treesize of output 25 [2021-07-09 18:27:33,174 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:33,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:33,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:33,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-07-09 18:27:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:33,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998263126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:33,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:33,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:33,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852940992] [2021-07-09 18:27:33,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:33,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:33,242 INFO L87 Difference]: Start difference. First operand 7078 states and 24192 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:34,624 INFO L93 Difference]: Finished difference Result 10337 states and 34372 transitions. [2021-07-09 18:27:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:27:34,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:27:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:34,644 INFO L225 Difference]: With dead ends: 10337 [2021-07-09 18:27:34,644 INFO L226 Difference]: Without dead ends: 10256 [2021-07-09 18:27:34,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:27:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10256 states. [2021-07-09 18:27:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10256 to 7079. [2021-07-09 18:27:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-07-09 18:27:34,770 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-07-09 18:27:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:34,770 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-07-09 18:27:34,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-07-09 18:27:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:34,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:34,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:34,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-09 18:27:34,981 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash 211718524, now seen corresponding path program 81 times [2021-07-09 18:27:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:34,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697516075] [2021-07-09 18:27:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:35,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:35,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697516075] [2021-07-09 18:27:35,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697516075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:35,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219120032] [2021-07-09 18:27:35,152 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 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 [2021-07-09 18:27:35,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:27:35,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:35,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:35,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:35,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:27:35,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:35,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:35,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:35,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:50 [2021-07-09 18:27:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:35,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219120032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:35,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:35,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:35,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766211041] [2021-07-09 18:27:35,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:35,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:35,454 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:27:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:36,057 INFO L93 Difference]: Finished difference Result 8987 states and 30270 transitions. [2021-07-09 18:27:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:27:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:27:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:36,075 INFO L225 Difference]: With dead ends: 8987 [2021-07-09 18:27:36,076 INFO L226 Difference]: Without dead ends: 8962 [2021-07-09 18:27:36,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:27:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-07-09 18:27:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 7079. [2021-07-09 18:27:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.418338513704436) internal successors, (24195), 7078 states have internal predecessors, (24195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 24195 transitions. [2021-07-09 18:27:36,206 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 24195 transitions. Word has length 30 [2021-07-09 18:27:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:36,206 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 24195 transitions. [2021-07-09 18:27:36,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:27:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 24195 transitions. [2021-07-09 18:27:36,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:36,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:36,218 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:36,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 18:27:36,418 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1547132172, now seen corresponding path program 82 times [2021-07-09 18:27:36,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:36,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673398990] [2021-07-09 18:27:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:36,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:36,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673398990] [2021-07-09 18:27:36,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673398990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:36,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836503379] [2021-07-09 18:27:36,613 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 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 [2021-07-09 18:27:36,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:36,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:36,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:36,827 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 19 treesize of output 19 [2021-07-09 18:27:36,828 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:36,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:36,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:36,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:27:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836503379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:36,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:36,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988986651] [2021-07-09 18:27:36,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:36,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:36,877 INFO L87 Difference]: Start difference. First operand 7079 states and 24195 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:27:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:38,112 INFO L93 Difference]: Finished difference Result 9428 states and 31713 transitions. [2021-07-09 18:27:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:27:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:27:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:38,132 INFO L225 Difference]: With dead ends: 9428 [2021-07-09 18:27:38,132 INFO L226 Difference]: Without dead ends: 9413 [2021-07-09 18:27:38,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:27:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9413 states. [2021-07-09 18:27:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9413 to 7076. [2021-07-09 18:27:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.417950530035336) internal successors, (24182), 7075 states have internal predecessors, (24182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:38,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24182 transitions. [2021-07-09 18:27:38,276 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24182 transitions. Word has length 30 [2021-07-09 18:27:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:38,276 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24182 transitions. [2021-07-09 18:27:38,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:27:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24182 transitions. [2021-07-09 18:27:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:38,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:38,287 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:38,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-07-09 18:27:38,487 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash 790201086, now seen corresponding path program 83 times [2021-07-09 18:27:38,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:38,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550983185] [2021-07-09 18:27:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:38,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:38,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550983185] [2021-07-09 18:27:38,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550983185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:38,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273669480] [2021-07-09 18:27:38,667 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 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 [2021-07-09 18:27:38,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:27:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:38,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:38,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:38,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:38,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:38,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:27:38,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:38,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:38,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:38,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:27:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:38,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273669480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:38,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:38,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:38,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958706790] [2021-07-09 18:27:38,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:38,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:38,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:38,951 INFO L87 Difference]: Start difference. First operand 7076 states and 24182 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:39,351 INFO L93 Difference]: Finished difference Result 8712 states and 29355 transitions. [2021-07-09 18:27:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:27:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:27:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:39,368 INFO L225 Difference]: With dead ends: 8712 [2021-07-09 18:27:39,368 INFO L226 Difference]: Without dead ends: 8691 [2021-07-09 18:27:39,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:27:39,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8691 states. [2021-07-09 18:27:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8691 to 7081. [2021-07-09 18:27:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.418502824858757) internal successors, (24203), 7080 states have internal predecessors, (24203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 24203 transitions. [2021-07-09 18:27:39,496 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 24203 transitions. Word has length 30 [2021-07-09 18:27:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:39,497 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 24203 transitions. [2021-07-09 18:27:39,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:27:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 24203 transitions. [2021-07-09 18:27:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:39,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:39,508 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:39,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 18:27:39,708 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash 988544462, now seen corresponding path program 84 times [2021-07-09 18:27:39,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:39,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256076865] [2021-07-09 18:27:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:39,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:39,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256076865] [2021-07-09 18:27:39,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256076865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:39,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146321671] [2021-07-09 18:27:39,888 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 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 [2021-07-09 18:27:39,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:27:39,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:27:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:40,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:40,131 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 21 treesize of output 21 [2021-07-09 18:27:40,132 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:40,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:40,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:40,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:25 [2021-07-09 18:27:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146321671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:40,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:40,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-07-09 18:27:40,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111500205] [2021-07-09 18:27:40,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:27:40,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:40,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:27:40,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:27:40,211 INFO L87 Difference]: Start difference. First operand 7081 states and 24203 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:42,038 INFO L93 Difference]: Finished difference Result 9784 states and 32690 transitions. [2021-07-09 18:27:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:27:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:27:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:42,058 INFO L225 Difference]: With dead ends: 9784 [2021-07-09 18:27:42,058 INFO L226 Difference]: Without dead ends: 9744 [2021-07-09 18:27:42,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1230.4ms TimeCoverageRelationStatistics Valid=348, Invalid=2514, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:27:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-07-09 18:27:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 7077. [2021-07-09 18:27:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.4166195590729225) internal successors, (24176), 7076 states have internal predecessors, (24176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 24176 transitions. [2021-07-09 18:27:42,198 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 24176 transitions. Word has length 30 [2021-07-09 18:27:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:42,198 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 24176 transitions. [2021-07-09 18:27:42,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 24176 transitions. [2021-07-09 18:27:42,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:42,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:42,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:42,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-09 18:27:42,409 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:42,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1508282850, now seen corresponding path program 85 times [2021-07-09 18:27:42,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:42,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112181668] [2021-07-09 18:27:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:42,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:42,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112181668] [2021-07-09 18:27:42,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112181668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:42,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897243171] [2021-07-09 18:27:42,603 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 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 [2021-07-09 18:27:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:42,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:42,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:42,780 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 19 treesize of output 19 [2021-07-09 18:27:42,781 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:42,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:42,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:42,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:27:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897243171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:42,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:42,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:42,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282303187] [2021-07-09 18:27:42,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:42,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:42,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:42,858 INFO L87 Difference]: Start difference. First operand 7077 states and 24176 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:27:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:43,345 INFO L93 Difference]: Finished difference Result 8973 states and 30216 transitions. [2021-07-09 18:27:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:27:43,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:27:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:43,363 INFO L225 Difference]: With dead ends: 8973 [2021-07-09 18:27:43,363 INFO L226 Difference]: Without dead ends: 8938 [2021-07-09 18:27:43,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:27:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-07-09 18:27:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 7076. [2021-07-09 18:27:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.416678445229682) internal successors, (24173), 7075 states have internal predecessors, (24173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 24173 transitions. [2021-07-09 18:27:43,483 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 24173 transitions. Word has length 30 [2021-07-09 18:27:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:43,483 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 24173 transitions. [2021-07-09 18:27:43,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:27:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 24173 transitions. [2021-07-09 18:27:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:43,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:43,494 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:43,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:43,695 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1182471836, now seen corresponding path program 86 times [2021-07-09 18:27:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:43,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801958403] [2021-07-09 18:27:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:43,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:43,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801958403] [2021-07-09 18:27:43,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801958403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:43,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30489516] [2021-07-09 18:27:43,844 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 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 [2021-07-09 18:27:43,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:43,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:44,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:44,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:27:44,047 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:44,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:44,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:44,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:27:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:44,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30489516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:44,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:44,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:44,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759312960] [2021-07-09 18:27:44,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:44,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:44,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:44,094 INFO L87 Difference]: Start difference. First operand 7076 states and 24173 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:46,629 INFO L93 Difference]: Finished difference Result 12654 states and 41623 transitions. [2021-07-09 18:27:46,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:27:46,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:27:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:46,657 INFO L225 Difference]: With dead ends: 12654 [2021-07-09 18:27:46,658 INFO L226 Difference]: Without dead ends: 12575 [2021-07-09 18:27:46,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1879.3ms TimeCoverageRelationStatistics Valid=754, Invalid=4358, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:27:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-07-09 18:27:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 7133. [2021-07-09 18:27:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 7132 states have (on average 3.415171060011217) internal successors, (24357), 7132 states have internal predecessors, (24357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 24357 transitions. [2021-07-09 18:27:46,820 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 24357 transitions. Word has length 30 [2021-07-09 18:27:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:46,820 INFO L482 AbstractCegarLoop]: Abstraction has 7133 states and 24357 transitions. [2021-07-09 18:27:46,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 24357 transitions. [2021-07-09 18:27:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:46,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:46,831 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:47,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:47,031 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash -668317764, now seen corresponding path program 87 times [2021-07-09 18:27:47,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:47,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932500923] [2021-07-09 18:27:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:47,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932500923] [2021-07-09 18:27:47,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932500923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:47,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459491915] [2021-07-09 18:27:47,172 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 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 [2021-07-09 18:27:47,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:27:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:47,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:47,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:47,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:47,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 27 [2021-07-09 18:27:47,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:47,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:47,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:47,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:65 [2021-07-09 18:27:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:47,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459491915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:47,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:47,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:47,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161382393] [2021-07-09 18:27:47,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:47,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:47,475 INFO L87 Difference]: Start difference. First operand 7133 states and 24357 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:27:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:48,948 INFO L93 Difference]: Finished difference Result 10504 states and 34841 transitions. [2021-07-09 18:27:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:27:48,949 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:27:48,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:48,970 INFO L225 Difference]: With dead ends: 10504 [2021-07-09 18:27:48,971 INFO L226 Difference]: Without dead ends: 10458 [2021-07-09 18:27:48,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1163.2ms TimeCoverageRelationStatistics Valid=430, Invalid=2540, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:27:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10458 states. [2021-07-09 18:27:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10458 to 7177. [2021-07-09 18:27:49,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-07-09 18:27:49,117 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-07-09 18:27:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:49,117 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-07-09 18:27:49,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:27:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-07-09 18:27:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:49,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:49,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:49,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:49,329 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash -221047002, now seen corresponding path program 88 times [2021-07-09 18:27:49,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:49,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706899878] [2021-07-09 18:27:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:49,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:49,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706899878] [2021-07-09 18:27:49,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706899878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:49,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438475323] [2021-07-09 18:27:49,484 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 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 [2021-07-09 18:27:49,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:27:49,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:49,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:49,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:27:49,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:49,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:49,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:49,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:27:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:49,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438475323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:49,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:49,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:27:49,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803289326] [2021-07-09 18:27:49,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:27:49,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:49,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:27:49,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:27:49,772 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:27:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:50,797 INFO L93 Difference]: Finished difference Result 8909 states and 29971 transitions. [2021-07-09 18:27:50,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:27:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:27:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:50,814 INFO L225 Difference]: With dead ends: 8909 [2021-07-09 18:27:50,814 INFO L226 Difference]: Without dead ends: 8888 [2021-07-09 18:27:50,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:27:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8888 states. [2021-07-09 18:27:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8888 to 7177. [2021-07-09 18:27:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7176 states have (on average 3.4158305462653287) internal successors, (24512), 7176 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 24512 transitions. [2021-07-09 18:27:50,927 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 24512 transitions. Word has length 30 [2021-07-09 18:27:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:50,927 INFO L482 AbstractCegarLoop]: Abstraction has 7177 states and 24512 transitions. [2021-07-09 18:27:50,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:27:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 24512 transitions. [2021-07-09 18:27:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:50,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:50,938 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:51,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-09 18:27:51,141 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:51,141 INFO L82 PathProgramCache]: Analyzing trace with hash 43416822, now seen corresponding path program 89 times [2021-07-09 18:27:51,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:51,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27876780] [2021-07-09 18:27:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:51,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:51,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27876780] [2021-07-09 18:27:51,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27876780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:51,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851839838] [2021-07-09 18:27:51,350 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 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 [2021-07-09 18:27:51,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:27:51,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:27:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:51,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:51,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:27:51,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:27:51,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:51,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:51,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:67 [2021-07-09 18:27:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:51,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851839838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:51,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:51,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:27:51,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370727002] [2021-07-09 18:27:51,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:51,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:51,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:51,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:51,802 INFO L87 Difference]: Start difference. First operand 7177 states and 24512 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:53,929 INFO L93 Difference]: Finished difference Result 9613 states and 32165 transitions. [2021-07-09 18:27:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:27:53,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:27:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:53,948 INFO L225 Difference]: With dead ends: 9613 [2021-07-09 18:27:53,948 INFO L226 Difference]: Without dead ends: 9533 [2021-07-09 18:27:53,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1739.3ms TimeCoverageRelationStatistics Valid=343, Invalid=2107, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:27:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-07-09 18:27:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 7204. [2021-07-09 18:27:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7204 states, 7203 states have (on average 3.414549493266694) internal successors, (24595), 7203 states have internal predecessors, (24595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 24595 transitions. [2021-07-09 18:27:54,079 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 24595 transitions. Word has length 30 [2021-07-09 18:27:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:54,079 INFO L482 AbstractCegarLoop]: Abstraction has 7204 states and 24595 transitions. [2021-07-09 18:27:54,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:27:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 24595 transitions. [2021-07-09 18:27:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:54,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:54,090 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:54,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-09 18:27:54,291 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:54,291 INFO L82 PathProgramCache]: Analyzing trace with hash -572506508, now seen corresponding path program 90 times [2021-07-09 18:27:54,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:54,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583040531] [2021-07-09 18:27:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:54,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:54,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583040531] [2021-07-09 18:27:54,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583040531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:54,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719677221] [2021-07-09 18:27:54,542 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 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 [2021-07-09 18:27:54,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:27:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:54,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:27:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:54,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:54,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:54,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:54,788 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 29 treesize of output 25 [2021-07-09 18:27:54,789 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:54,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:54,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:54,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:27:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:54,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719677221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:54,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:54,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:27:54,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800654339] [2021-07-09 18:27:54,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:54,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:54,864 INFO L87 Difference]: Start difference. First operand 7204 states and 24595 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:57,359 INFO L93 Difference]: Finished difference Result 10561 states and 34976 transitions. [2021-07-09 18:27:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:27:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:27:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:57,378 INFO L225 Difference]: With dead ends: 10561 [2021-07-09 18:27:57,378 INFO L226 Difference]: Without dead ends: 10514 [2021-07-09 18:27:57,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1643.5ms TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:27:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-07-09 18:27:57,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 7197. [2021-07-09 18:27:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.415230683713174) internal successors, (24576), 7196 states have internal predecessors, (24576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 24576 transitions. [2021-07-09 18:27:57,502 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 24576 transitions. Word has length 30 [2021-07-09 18:27:57,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:57,502 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 24576 transitions. [2021-07-09 18:27:57,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:57,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 24576 transitions. [2021-07-09 18:27:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:57,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:57,513 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:57,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-09 18:27:57,713 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash -124071064, now seen corresponding path program 91 times [2021-07-09 18:27:57,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:57,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510593296] [2021-07-09 18:27:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:57,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:57,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510593296] [2021-07-09 18:27:57,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510593296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:57,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383234761] [2021-07-09 18:27:57,989 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 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 [2021-07-09 18:27:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:58,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:58,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:27:58,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:27:58,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:58,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:58,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:27:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:58,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383234761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:58,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:27:58,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:27:58,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153483499] [2021-07-09 18:27:58,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:27:58,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:27:58,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:27:58,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:27:58,223 INFO L87 Difference]: Start difference. First operand 7197 states and 24576 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:27:59,217 INFO L93 Difference]: Finished difference Result 8814 states and 29558 transitions. [2021-07-09 18:27:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:27:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:27:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:27:59,234 INFO L225 Difference]: With dead ends: 8814 [2021-07-09 18:27:59,234 INFO L226 Difference]: Without dead ends: 8788 [2021-07-09 18:27:59,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:27:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8788 states. [2021-07-09 18:27:59,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8788 to 7205. [2021-07-09 18:27:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 3.4144919489172683) internal successors, (24598), 7204 states have internal predecessors, (24598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 24598 transitions. [2021-07-09 18:27:59,369 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 24598 transitions. Word has length 30 [2021-07-09 18:27:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:27:59,369 INFO L482 AbstractCegarLoop]: Abstraction has 7205 states and 24598 transitions. [2021-07-09 18:27:59,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:27:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 24598 transitions. [2021-07-09 18:27:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:27:59,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:27:59,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:27:59,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:27:59,580 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:27:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:27:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1414795236, now seen corresponding path program 92 times [2021-07-09 18:27:59,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:27:59,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733971825] [2021-07-09 18:27:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:27:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:27:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:27:59,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:27:59,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733971825] [2021-07-09 18:27:59,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733971825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:27:59,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592758591] [2021-07-09 18:27:59,766 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 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 [2021-07-09 18:27:59,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:27:59,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:27:59,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:27:59,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:27:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:27:59,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:59,970 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 19 treesize of output 19 [2021-07-09 18:27:59,971 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:27:59,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:27:59,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:27:59,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:28:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592758591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:00,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:00,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:28:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067306559] [2021-07-09 18:28:00,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:00,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:00,018 INFO L87 Difference]: Start difference. First operand 7205 states and 24598 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:03,110 INFO L93 Difference]: Finished difference Result 12224 states and 40164 transitions. [2021-07-09 18:28:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:28:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:03,138 INFO L225 Difference]: With dead ends: 12224 [2021-07-09 18:28:03,138 INFO L226 Difference]: Without dead ends: 12147 [2021-07-09 18:28:03,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 2409.0ms TimeCoverageRelationStatistics Valid=1026, Invalid=5946, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:28:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-07-09 18:28:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 7309. [2021-07-09 18:28:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7309 states, 7308 states have (on average 3.4143404488232076) internal successors, (24952), 7308 states have internal predecessors, (24952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7309 states to 7309 states and 24952 transitions. [2021-07-09 18:28:03,308 INFO L78 Accepts]: Start accepts. Automaton has 7309 states and 24952 transitions. Word has length 30 [2021-07-09 18:28:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:03,308 INFO L482 AbstractCegarLoop]: Abstraction has 7309 states and 24952 transitions. [2021-07-09 18:28:03,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7309 states and 24952 transitions. [2021-07-09 18:28:03,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:03,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:03,322 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:03,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:03,523 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:03,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:03,523 INFO L82 PathProgramCache]: Analyzing trace with hash 781180196, now seen corresponding path program 93 times [2021-07-09 18:28:03,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:03,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860177299] [2021-07-09 18:28:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:03,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:03,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:03,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860177299] [2021-07-09 18:28:03,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860177299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421094608] [2021-07-09 18:28:03,719 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 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 [2021-07-09 18:28:03,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:03,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:03,894 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 19 treesize of output 19 [2021-07-09 18:28:03,895 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:03,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:03,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:03,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:28:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:03,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421094608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:03,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:03,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:28:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387788328] [2021-07-09 18:28:03,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:03,974 INFO L87 Difference]: Start difference. First operand 7309 states and 24952 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:06,464 INFO L93 Difference]: Finished difference Result 12077 states and 39682 transitions. [2021-07-09 18:28:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-09 18:28:06,464 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:06,486 INFO L225 Difference]: With dead ends: 12077 [2021-07-09 18:28:06,486 INFO L226 Difference]: Without dead ends: 11990 [2021-07-09 18:28:06,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1906.8ms TimeCoverageRelationStatistics Valid=929, Invalid=5077, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:28:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-07-09 18:28:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 7424. [2021-07-09 18:28:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7424 states, 7423 states have (on average 3.416004310925502) internal successors, (25357), 7423 states have internal predecessors, (25357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7424 states to 7424 states and 25357 transitions. [2021-07-09 18:28:06,642 INFO L78 Accepts]: Start accepts. Automaton has 7424 states and 25357 transitions. Word has length 30 [2021-07-09 18:28:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:06,642 INFO L482 AbstractCegarLoop]: Abstraction has 7424 states and 25357 transitions. [2021-07-09 18:28:06,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7424 states and 25357 transitions. [2021-07-09 18:28:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:06,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:06,654 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:06,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-07-09 18:28:06,854 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1722423664, now seen corresponding path program 94 times [2021-07-09 18:28:06,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:06,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394100961] [2021-07-09 18:28:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:07,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394100961] [2021-07-09 18:28:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394100961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720467169] [2021-07-09 18:28:07,101 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 [2021-07-09 18:28:07,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:07,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:07,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:07,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:28:07,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:07,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:07,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:07,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720467169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:07,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:07,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:28:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703659538] [2021-07-09 18:28:07,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:07,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:07,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:07,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:07,359 INFO L87 Difference]: Start difference. First operand 7424 states and 25357 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:28:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:09,841 INFO L93 Difference]: Finished difference Result 10675 states and 35520 transitions. [2021-07-09 18:28:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 18:28:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:28:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:09,862 INFO L225 Difference]: With dead ends: 10675 [2021-07-09 18:28:09,862 INFO L226 Difference]: Without dead ends: 10642 [2021-07-09 18:28:09,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1850.5ms TimeCoverageRelationStatistics Valid=612, Invalid=3944, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:28:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10642 states. [2021-07-09 18:28:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10642 to 7435. [2021-07-09 18:28:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7435 states, 7434 states have (on average 3.4170029593758406) internal successors, (25402), 7434 states have internal predecessors, (25402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7435 states to 7435 states and 25402 transitions. [2021-07-09 18:28:10,000 INFO L78 Accepts]: Start accepts. Automaton has 7435 states and 25402 transitions. Word has length 30 [2021-07-09 18:28:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:10,001 INFO L482 AbstractCegarLoop]: Abstraction has 7435 states and 25402 transitions. [2021-07-09 18:28:10,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:28:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7435 states and 25402 transitions. [2021-07-09 18:28:10,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:10,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:10,012 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:10,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-09 18:28:10,212 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:10,212 INFO L82 PathProgramCache]: Analyzing trace with hash 344478350, now seen corresponding path program 95 times [2021-07-09 18:28:10,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:10,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221315039] [2021-07-09 18:28:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:10,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221315039] [2021-07-09 18:28:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221315039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605428672] [2021-07-09 18:28:10,389 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 [2021-07-09 18:28:10,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:28:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:10,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:28:10,614 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:10,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:10,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:10,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:28:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:10,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605428672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:10,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:10,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:28:10,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037733580] [2021-07-09 18:28:10,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:10,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:10,664 INFO L87 Difference]: Start difference. First operand 7435 states and 25402 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:28:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:11,758 INFO L93 Difference]: Finished difference Result 10176 states and 34003 transitions. [2021-07-09 18:28:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:28:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:28:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:11,778 INFO L225 Difference]: With dead ends: 10176 [2021-07-09 18:28:11,778 INFO L226 Difference]: Without dead ends: 10123 [2021-07-09 18:28:11,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 961.1ms TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:28:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-07-09 18:28:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 7439. [2021-07-09 18:28:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7439 states, 7438 states have (on average 3.4167787039526756) internal successors, (25414), 7438 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7439 states to 7439 states and 25414 transitions. [2021-07-09 18:28:11,915 INFO L78 Accepts]: Start accepts. Automaton has 7439 states and 25414 transitions. Word has length 30 [2021-07-09 18:28:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:11,915 INFO L482 AbstractCegarLoop]: Abstraction has 7439 states and 25414 transitions. [2021-07-09 18:28:11,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:28:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7439 states and 25414 transitions. [2021-07-09 18:28:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:11,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:11,926 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:12,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:12,126 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:12,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:12,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2112307908, now seen corresponding path program 96 times [2021-07-09 18:28:12,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:12,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874550040] [2021-07-09 18:28:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:12,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:12,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874550040] [2021-07-09 18:28:12,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874550040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:12,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264364471] [2021-07-09 18:28:12,330 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 [2021-07-09 18:28:12,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:12,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:12,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:12,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:12,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:12,499 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 23 treesize of output 23 [2021-07-09 18:28:12,500 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:12,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:12,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:12,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:28:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:12,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264364471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:12,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:12,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:28:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353511015] [2021-07-09 18:28:12,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:28:12,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:28:12,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:28:12,566 INFO L87 Difference]: Start difference. First operand 7439 states and 25414 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:28:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:13,052 INFO L93 Difference]: Finished difference Result 9163 states and 30845 transitions. [2021-07-09 18:28:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:28:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-07-09 18:28:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:13,069 INFO L225 Difference]: With dead ends: 9163 [2021-07-09 18:28:13,069 INFO L226 Difference]: Without dead ends: 9128 [2021-07-09 18:28:13,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:28:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9128 states. [2021-07-09 18:28:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9128 to 7444. [2021-07-09 18:28:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7444 states, 7443 states have (on average 3.4167674324869006) internal successors, (25431), 7443 states have internal predecessors, (25431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7444 states to 7444 states and 25431 transitions. [2021-07-09 18:28:13,191 INFO L78 Accepts]: Start accepts. Automaton has 7444 states and 25431 transitions. Word has length 30 [2021-07-09 18:28:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:13,191 INFO L482 AbstractCegarLoop]: Abstraction has 7444 states and 25431 transitions. [2021-07-09 18:28:13,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:28:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 7444 states and 25431 transitions. [2021-07-09 18:28:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:13,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:13,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:13,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:13,403 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash 697570062, now seen corresponding path program 97 times [2021-07-09 18:28:13,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:13,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008765739] [2021-07-09 18:28:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:13,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008765739] [2021-07-09 18:28:13,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008765739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872720541] [2021-07-09 18:28:13,599 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 [2021-07-09 18:28:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:13,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:13,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:13,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:28:13,786 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:13,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:13,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:13,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:28:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:13,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872720541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:13,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:13,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:28:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242075773] [2021-07-09 18:28:13,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:28:13,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:13,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:28:13,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:28:13,833 INFO L87 Difference]: Start difference. First operand 7444 states and 25431 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:28:14,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:14,488 INFO L93 Difference]: Finished difference Result 9484 states and 31723 transitions. [2021-07-09 18:28:14,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:28:14,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-07-09 18:28:14,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:14,509 INFO L225 Difference]: With dead ends: 9484 [2021-07-09 18:28:14,510 INFO L226 Difference]: Without dead ends: 9449 [2021-07-09 18:28:14,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:28:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-07-09 18:28:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 7453. [2021-07-09 18:28:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.416935050993022) internal successors, (25463), 7452 states have internal predecessors, (25463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 25463 transitions. [2021-07-09 18:28:14,651 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 25463 transitions. Word has length 30 [2021-07-09 18:28:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:14,651 INFO L482 AbstractCegarLoop]: Abstraction has 7453 states and 25463 transitions. [2021-07-09 18:28:14,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:28:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 25463 transitions. [2021-07-09 18:28:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:14,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:14,662 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:14,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:14,865 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash -992372842, now seen corresponding path program 98 times [2021-07-09 18:28:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:14,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826843202] [2021-07-09 18:28:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:15,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:15,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826843202] [2021-07-09 18:28:15,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826843202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:15,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726139458] [2021-07-09 18:28:15,099 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 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 [2021-07-09 18:28:15,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:15,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:28:15,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:15,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:15,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:28:15,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:15,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:15,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:15,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:15,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726139458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:15,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:15,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:28:15,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591228054] [2021-07-09 18:28:15,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:28:15,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:15,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:28:15,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:28:15,338 INFO L87 Difference]: Start difference. First operand 7453 states and 25463 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:28:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:15,850 INFO L93 Difference]: Finished difference Result 8692 states and 29282 transitions. [2021-07-09 18:28:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:28:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-07-09 18:28:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:15,866 INFO L225 Difference]: With dead ends: 8692 [2021-07-09 18:28:15,866 INFO L226 Difference]: Without dead ends: 8666 [2021-07-09 18:28:15,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:28:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2021-07-09 18:28:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 7455. [2021-07-09 18:28:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4174939629729004) internal successors, (25474), 7454 states have internal predecessors, (25474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25474 transitions. [2021-07-09 18:28:15,984 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25474 transitions. Word has length 30 [2021-07-09 18:28:15,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:15,984 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25474 transitions. [2021-07-09 18:28:15,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:28:15,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25474 transitions. [2021-07-09 18:28:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:15,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:15,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:16,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-09 18:28:16,203 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash 961333420, now seen corresponding path program 99 times [2021-07-09 18:28:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:16,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984214699] [2021-07-09 18:28:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:16,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984214699] [2021-07-09 18:28:16,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984214699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:16,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466256846] [2021-07-09 18:28:16,376 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 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 [2021-07-09 18:28:16,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:16,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:28:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:16,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:16,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:16,613 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 19 treesize of output 27 [2021-07-09 18:28:16,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:16,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:16,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:16,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:53 [2021-07-09 18:28:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:16,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466256846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:16,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:16,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:28:16,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625415338] [2021-07-09 18:28:16,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:16,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:16,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:16,746 INFO L87 Difference]: Start difference. First operand 7455 states and 25474 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:19,434 INFO L93 Difference]: Finished difference Result 9935 states and 33090 transitions. [2021-07-09 18:28:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:28:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:19,454 INFO L225 Difference]: With dead ends: 9935 [2021-07-09 18:28:19,454 INFO L226 Difference]: Without dead ends: 9895 [2021-07-09 18:28:19,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1870.8ms TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:28:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-07-09 18:28:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 7459. [2021-07-09 18:28:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 7458 states have (on average 3.417538213998391) internal successors, (25488), 7458 states have internal predecessors, (25488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 25488 transitions. [2021-07-09 18:28:19,611 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 25488 transitions. Word has length 30 [2021-07-09 18:28:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:19,611 INFO L482 AbstractCegarLoop]: Abstraction has 7459 states and 25488 transitions. [2021-07-09 18:28:19,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 25488 transitions. [2021-07-09 18:28:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:19,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:19,622 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:19,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-09 18:28:19,823 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash -542447488, now seen corresponding path program 100 times [2021-07-09 18:28:19,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:19,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705435857] [2021-07-09 18:28:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:19,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:19,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705435857] [2021-07-09 18:28:19,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705435857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:19,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299804487] [2021-07-09 18:28:19,994 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 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 [2021-07-09 18:28:20,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:20,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:20,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:20,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:28:20,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:20,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:20,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:20,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299804487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:20,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:20,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:28:20,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285959693] [2021-07-09 18:28:20,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:20,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:20,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:20,246 INFO L87 Difference]: Start difference. First operand 7459 states and 25488 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:28:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:21,191 INFO L93 Difference]: Finished difference Result 9448 states and 31860 transitions. [2021-07-09 18:28:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:28:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:28:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:21,211 INFO L225 Difference]: With dead ends: 9448 [2021-07-09 18:28:21,211 INFO L226 Difference]: Without dead ends: 9433 [2021-07-09 18:28:21,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 738.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:28:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-07-09 18:28:21,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7463. [2021-07-09 18:28:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7463 states, 7462 states have (on average 3.4178504422406863) internal successors, (25504), 7462 states have internal predecessors, (25504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7463 states to 7463 states and 25504 transitions. [2021-07-09 18:28:21,343 INFO L78 Accepts]: Start accepts. Automaton has 7463 states and 25504 transitions. Word has length 30 [2021-07-09 18:28:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:21,343 INFO L482 AbstractCegarLoop]: Abstraction has 7463 states and 25504 transitions. [2021-07-09 18:28:21,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:28:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7463 states and 25504 transitions. [2021-07-09 18:28:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:21,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:21,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:21,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:21,555 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash -796111322, now seen corresponding path program 101 times [2021-07-09 18:28:21,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:21,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896173201] [2021-07-09 18:28:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:21,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:21,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896173201] [2021-07-09 18:28:21,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896173201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10090897] [2021-07-09 18:28:21,774 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 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 [2021-07-09 18:28:21,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:28:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:21,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:21,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:21,976 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 19 treesize of output 19 [2021-07-09 18:28:21,977 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:21,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:21,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:21,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:28:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:22,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10090897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:22,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:22,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:28:22,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204711596] [2021-07-09 18:28:22,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:22,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:22,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:22,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:22,026 INFO L87 Difference]: Start difference. First operand 7463 states and 25504 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:28:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:23,135 INFO L93 Difference]: Finished difference Result 9840 states and 33135 transitions. [2021-07-09 18:28:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:28:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:28:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:23,156 INFO L225 Difference]: With dead ends: 9840 [2021-07-09 18:28:23,156 INFO L226 Difference]: Without dead ends: 9825 [2021-07-09 18:28:23,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 943.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:28:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9825 states. [2021-07-09 18:28:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9825 to 7460. [2021-07-09 18:28:23,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7460 states, 7459 states have (on average 3.417482236224695) internal successors, (25491), 7459 states have internal predecessors, (25491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7460 states to 7460 states and 25491 transitions. [2021-07-09 18:28:23,293 INFO L78 Accepts]: Start accepts. Automaton has 7460 states and 25491 transitions. Word has length 30 [2021-07-09 18:28:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:23,293 INFO L482 AbstractCegarLoop]: Abstraction has 7460 states and 25491 transitions. [2021-07-09 18:28:23,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:28:23,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7460 states and 25491 transitions. [2021-07-09 18:28:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:23,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:23,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:23,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:23,505 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:23,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:23,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1339332396, now seen corresponding path program 102 times [2021-07-09 18:28:23,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:23,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605499854] [2021-07-09 18:28:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:23,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:23,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605499854] [2021-07-09 18:28:23,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605499854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:23,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701362694] [2021-07-09 18:28:23,712 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 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 [2021-07-09 18:28:23,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:23,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:23,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:23,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:23,954 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 23 treesize of output 31 [2021-07-09 18:28:23,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:28:23,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:23,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:23,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:48 [2021-07-09 18:28:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:24,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701362694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:24,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:24,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:28:24,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552585350] [2021-07-09 18:28:24,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:24,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:24,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:24,107 INFO L87 Difference]: Start difference. First operand 7460 states and 25491 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:26,422 INFO L93 Difference]: Finished difference Result 9693 states and 32346 transitions. [2021-07-09 18:28:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:28:26,422 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:26,442 INFO L225 Difference]: With dead ends: 9693 [2021-07-09 18:28:26,442 INFO L226 Difference]: Without dead ends: 9650 [2021-07-09 18:28:26,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1487.4ms TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:28:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9650 states. [2021-07-09 18:28:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9650 to 7448. [2021-07-09 18:28:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7448 states, 7447 states have (on average 3.4157378810259167) internal successors, (25437), 7447 states have internal predecessors, (25437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7448 states to 7448 states and 25437 transitions. [2021-07-09 18:28:26,590 INFO L78 Accepts]: Start accepts. Automaton has 7448 states and 25437 transitions. Word has length 30 [2021-07-09 18:28:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:26,590 INFO L482 AbstractCegarLoop]: Abstraction has 7448 states and 25437 transitions. [2021-07-09 18:28:26,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 7448 states and 25437 transitions. [2021-07-09 18:28:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:26,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:26,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:26,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:26,801 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash -508670674, now seen corresponding path program 103 times [2021-07-09 18:28:26,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:26,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212540042] [2021-07-09 18:28:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:26,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:26,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212540042] [2021-07-09 18:28:26,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212540042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:26,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793923597] [2021-07-09 18:28:26,998 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 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 [2021-07-09 18:28:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:27,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:27,202 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 19 treesize of output 19 [2021-07-09 18:28:27,203 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:27,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:27,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:27,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:28:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:27,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793923597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:27,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:27,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:28:27,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975690839] [2021-07-09 18:28:27,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:27,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:27,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:27,256 INFO L87 Difference]: Start difference. First operand 7448 states and 25437 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:28:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:27,975 INFO L93 Difference]: Finished difference Result 9634 states and 32382 transitions. [2021-07-09 18:28:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:28:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 30 [2021-07-09 18:28:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:27,994 INFO L225 Difference]: With dead ends: 9634 [2021-07-09 18:28:27,994 INFO L226 Difference]: Without dead ends: 9615 [2021-07-09 18:28:27,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:28:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9615 states. [2021-07-09 18:28:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9615 to 7445. [2021-07-09 18:28:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7445 states, 7444 states have (on average 3.415368081676518) internal successors, (25424), 7444 states have internal predecessors, (25424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7445 states to 7445 states and 25424 transitions. [2021-07-09 18:28:28,160 INFO L78 Accepts]: Start accepts. Automaton has 7445 states and 25424 transitions. Word has length 30 [2021-07-09 18:28:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:28,161 INFO L482 AbstractCegarLoop]: Abstraction has 7445 states and 25424 transitions. [2021-07-09 18:28:28,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) [2021-07-09 18:28:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7445 states and 25424 transitions. [2021-07-09 18:28:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:28,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:28,171 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:28,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-07-09 18:28:28,372 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1583656386, now seen corresponding path program 104 times [2021-07-09 18:28:28,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:28,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803336688] [2021-07-09 18:28:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:28,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803336688] [2021-07-09 18:28:28,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803336688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:28,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667646460] [2021-07-09 18:28:28,578 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 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 [2021-07-09 18:28:28,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:28,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:28,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:28,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-07-09 18:28:28,747 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:28,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:28,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:28,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:28:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:28,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667646460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:28,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:28,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:28:28,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102940320] [2021-07-09 18:28:28,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:28:28,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:28,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:28:28,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:28:28,827 INFO L87 Difference]: Start difference. First operand 7445 states and 25424 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:28:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:29,839 INFO L93 Difference]: Finished difference Result 9544 states and 32087 transitions. [2021-07-09 18:28:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:28:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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 30 [2021-07-09 18:28:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:29,859 INFO L225 Difference]: With dead ends: 9544 [2021-07-09 18:28:29,859 INFO L226 Difference]: Without dead ends: 9518 [2021-07-09 18:28:29,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:28:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-07-09 18:28:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7416. [2021-07-09 18:28:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7416 states, 7415 states have (on average 3.4163182737693862) internal successors, (25332), 7415 states have internal predecessors, (25332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 25332 transitions. [2021-07-09 18:28:29,993 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 25332 transitions. Word has length 30 [2021-07-09 18:28:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:29,993 INFO L482 AbstractCegarLoop]: Abstraction has 7416 states and 25332 transitions. [2021-07-09 18:28:29,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 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) [2021-07-09 18:28:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 25332 transitions. [2021-07-09 18:28:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:30,004 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:30,004 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:30,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:30,205 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash -416146950, now seen corresponding path program 105 times [2021-07-09 18:28:30,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:30,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029441522] [2021-07-09 18:28:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:30,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029441522] [2021-07-09 18:28:30,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029441522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:30,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753691994] [2021-07-09 18:28:30,433 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 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 [2021-07-09 18:28:30,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:30,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:30,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:30,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:30,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:30,628 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 23 treesize of output 23 [2021-07-09 18:28:30,629 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:30,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:30,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:30,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:28:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753691994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:30,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:30,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:28:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959023143] [2021-07-09 18:28:30,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:28:30,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:28:30,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:28:30,693 INFO L87 Difference]: Start difference. First operand 7416 states and 25332 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) [2021-07-09 18:28:32,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:32,043 INFO L93 Difference]: Finished difference Result 9828 states and 32975 transitions. [2021-07-09 18:28:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:28:32,043 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 30 [2021-07-09 18:28:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:32,063 INFO L225 Difference]: With dead ends: 9828 [2021-07-09 18:28:32,063 INFO L226 Difference]: Without dead ends: 9778 [2021-07-09 18:28:32,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1021.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:28:32,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-07-09 18:28:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7415. [2021-07-09 18:28:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7415 states, 7414 states have (on average 3.4136768276234153) internal successors, (25309), 7414 states have internal predecessors, (25309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7415 states to 7415 states and 25309 transitions. [2021-07-09 18:28:32,202 INFO L78 Accepts]: Start accepts. Automaton has 7415 states and 25309 transitions. Word has length 30 [2021-07-09 18:28:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:32,202 INFO L482 AbstractCegarLoop]: Abstraction has 7415 states and 25309 transitions. [2021-07-09 18:28:32,202 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) [2021-07-09 18:28:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7415 states and 25309 transitions. [2021-07-09 18:28:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:32,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:32,213 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:32,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:32,414 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 519931620, now seen corresponding path program 106 times [2021-07-09 18:28:32,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:32,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315079271] [2021-07-09 18:28:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:32,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315079271] [2021-07-09 18:28:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315079271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966902967] [2021-07-09 18:28:32,637 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 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 [2021-07-09 18:28:32,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:32,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:28:32,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:32,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:32,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:32,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966902967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:32,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:32,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:28:32,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282760713] [2021-07-09 18:28:32,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:32,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:32,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:32,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:32,905 INFO L87 Difference]: Start difference. First operand 7415 states and 25309 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-07-09 18:28:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:33,554 INFO L93 Difference]: Finished difference Result 9105 states and 30683 transitions. [2021-07-09 18:28:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:28:33,555 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 30 [2021-07-09 18:28:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:33,574 INFO L225 Difference]: With dead ends: 9105 [2021-07-09 18:28:33,574 INFO L226 Difference]: Without dead ends: 9083 [2021-07-09 18:28:33,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 595.0ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:28:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9083 states. [2021-07-09 18:28:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9083 to 7434. [2021-07-09 18:28:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7433 states have (on average 3.4138302166016414) internal successors, (25375), 7433 states have internal predecessors, (25375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 25375 transitions. [2021-07-09 18:28:33,711 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 25375 transitions. Word has length 30 [2021-07-09 18:28:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:33,711 INFO L482 AbstractCegarLoop]: Abstraction has 7434 states and 25375 transitions. [2021-07-09 18:28:33,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2021-07-09 18:28:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 25375 transitions. [2021-07-09 18:28:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:33,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:33,724 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:33,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable505 [2021-07-09 18:28:33,925 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:33,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1969487540, now seen corresponding path program 107 times [2021-07-09 18:28:33,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:33,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966799403] [2021-07-09 18:28:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:34,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:34,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966799403] [2021-07-09 18:28:34,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966799403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:34,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126486709] [2021-07-09 18:28:34,134 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 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 [2021-07-09 18:28:34,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:28:34,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:34,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:34,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:34,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:34,347 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 19 treesize of output 19 [2021-07-09 18:28:34,348 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:34,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:34,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:34,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:28:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:34,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126486709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:34,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:34,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:28:34,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916613094] [2021-07-09 18:28:34,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:34,397 INFO L87 Difference]: Start difference. First operand 7434 states and 25375 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:28:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:35,367 INFO L93 Difference]: Finished difference Result 9842 states and 33046 transitions. [2021-07-09 18:28:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:28:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-07-09 18:28:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:35,387 INFO L225 Difference]: With dead ends: 9842 [2021-07-09 18:28:35,387 INFO L226 Difference]: Without dead ends: 9816 [2021-07-09 18:28:35,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:28:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9816 states. [2021-07-09 18:28:35,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9816 to 7432. [2021-07-09 18:28:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 3.4128650248957073) internal successors, (25361), 7431 states have internal predecessors, (25361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 25361 transitions. [2021-07-09 18:28:35,528 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 25361 transitions. Word has length 30 [2021-07-09 18:28:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:35,528 INFO L482 AbstractCegarLoop]: Abstraction has 7432 states and 25361 transitions. [2021-07-09 18:28:35,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:28:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 25361 transitions. [2021-07-09 18:28:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:35,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:35,539 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:35,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:35,740 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1689012902, now seen corresponding path program 108 times [2021-07-09 18:28:35,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:35,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572276001] [2021-07-09 18:28:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:35,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572276001] [2021-07-09 18:28:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572276001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598218130] [2021-07-09 18:28:35,924 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 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 [2021-07-09 18:28:35,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:36,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,085 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 23 treesize of output 23 [2021-07-09 18:28:36,087 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:36,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:36,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:36,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:28:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:36,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598218130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:36,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:36,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:28:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496760901] [2021-07-09 18:28:36,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:36,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:36,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:36,154 INFO L87 Difference]: Start difference. First operand 7432 states and 25361 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:37,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:37,509 INFO L93 Difference]: Finished difference Result 9757 states and 32809 transitions. [2021-07-09 18:28:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:28:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:37,529 INFO L225 Difference]: With dead ends: 9757 [2021-07-09 18:28:37,530 INFO L226 Difference]: Without dead ends: 9713 [2021-07-09 18:28:37,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 972.9ms TimeCoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:28:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9713 states. [2021-07-09 18:28:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9713 to 7399. [2021-07-09 18:28:37,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7399 states, 7398 states have (on average 3.4138956474722897) internal successors, (25256), 7398 states have internal predecessors, (25256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7399 states to 7399 states and 25256 transitions. [2021-07-09 18:28:37,653 INFO L78 Accepts]: Start accepts. Automaton has 7399 states and 25256 transitions. Word has length 30 [2021-07-09 18:28:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:37,654 INFO L482 AbstractCegarLoop]: Abstraction has 7399 states and 25256 transitions. [2021-07-09 18:28:37,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 7399 states and 25256 transitions. [2021-07-09 18:28:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:37,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:37,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:37,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:37,865 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1746001132, now seen corresponding path program 109 times [2021-07-09 18:28:37,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:37,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417187665] [2021-07-09 18:28:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:38,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:38,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417187665] [2021-07-09 18:28:38,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417187665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:38,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751455344] [2021-07-09 18:28:38,048 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 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 [2021-07-09 18:28:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:38,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:38,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,242 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 19 treesize of output 19 [2021-07-09 18:28:38,243 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:38,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:38,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:38,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:28:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:38,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751455344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:38,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:38,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:28:38,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064774015] [2021-07-09 18:28:38,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:38,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:38,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:38,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:38,320 INFO L87 Difference]: Start difference. First operand 7399 states and 25256 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:28:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:39,199 INFO L93 Difference]: Finished difference Result 9549 states and 32090 transitions. [2021-07-09 18:28:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:28:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-07-09 18:28:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:39,220 INFO L225 Difference]: With dead ends: 9549 [2021-07-09 18:28:39,220 INFO L226 Difference]: Without dead ends: 9511 [2021-07-09 18:28:39,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:28:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9511 states. [2021-07-09 18:28:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9511 to 7411. [2021-07-09 18:28:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7411 states, 7410 states have (on average 3.414574898785425) internal successors, (25302), 7410 states have internal predecessors, (25302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7411 states to 7411 states and 25302 transitions. [2021-07-09 18:28:39,349 INFO L78 Accepts]: Start accepts. Automaton has 7411 states and 25302 transitions. Word has length 30 [2021-07-09 18:28:39,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:39,350 INFO L482 AbstractCegarLoop]: Abstraction has 7411 states and 25302 transitions. [2021-07-09 18:28:39,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:28:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7411 states and 25302 transitions. [2021-07-09 18:28:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:39,361 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:39,361 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:39,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:39,561 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash 298416662, now seen corresponding path program 110 times [2021-07-09 18:28:39,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:39,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133493512] [2021-07-09 18:28:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:39,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:39,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133493512] [2021-07-09 18:28:39,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133493512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:39,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916851648] [2021-07-09 18:28:39,815 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 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 [2021-07-09 18:28:39,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:39,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:39,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:40,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:40,018 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 19 treesize of output 11 [2021-07-09 18:28:40,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:40,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:40,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:40,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:7 [2021-07-09 18:28:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:40,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916851648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:40,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:40,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:28:40,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193611718] [2021-07-09 18:28:40,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:40,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:40,062 INFO L87 Difference]: Start difference. First operand 7411 states and 25302 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:28:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:41,162 INFO L93 Difference]: Finished difference Result 9078 states and 30424 transitions. [2021-07-09 18:28:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:28:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:28:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:41,180 INFO L225 Difference]: With dead ends: 9078 [2021-07-09 18:28:41,181 INFO L226 Difference]: Without dead ends: 9045 [2021-07-09 18:28:41,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 917.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:28:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9045 states. [2021-07-09 18:28:41,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9045 to 7438. [2021-07-09 18:28:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.412800860562055) internal successors, (25381), 7437 states have internal predecessors, (25381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25381 transitions. [2021-07-09 18:28:41,308 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25381 transitions. Word has length 30 [2021-07-09 18:28:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:41,308 INFO L482 AbstractCegarLoop]: Abstraction has 7438 states and 25381 transitions. [2021-07-09 18:28:41,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:28:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25381 transitions. [2021-07-09 18:28:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:41,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:41,319 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:41,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 18:28:41,520 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:41,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1937279850, now seen corresponding path program 111 times [2021-07-09 18:28:41,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:41,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65424712] [2021-07-09 18:28:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:41,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:41,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65424712] [2021-07-09 18:28:41,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65424712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:41,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836074982] [2021-07-09 18:28:41,768 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 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 [2021-07-09 18:28:41,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:28:41,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:41,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:41,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:28:41,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:41,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:41,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:41,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836074982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:41,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:41,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:28:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797577807] [2021-07-09 18:28:41,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:41,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:41,995 INFO L87 Difference]: Start difference. First operand 7438 states and 25381 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-07-09 18:28:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:43,706 INFO L93 Difference]: Finished difference Result 9393 states and 31341 transitions. [2021-07-09 18:28:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:28:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-07-09 18:28:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:43,726 INFO L225 Difference]: With dead ends: 9393 [2021-07-09 18:28:43,726 INFO L226 Difference]: Without dead ends: 9360 [2021-07-09 18:28:43,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1239.8ms TimeCoverageRelationStatistics Valid=311, Invalid=2041, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:28:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-07-09 18:28:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 7433. [2021-07-09 18:28:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.4122712594187297) internal successors, (25360), 7432 states have internal predecessors, (25360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 25360 transitions. [2021-07-09 18:28:43,856 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 25360 transitions. Word has length 30 [2021-07-09 18:28:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:43,856 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 25360 transitions. [2021-07-09 18:28:43,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-07-09 18:28:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 25360 transitions. [2021-07-09 18:28:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:43,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:43,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:44,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:44,068 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1168264038, now seen corresponding path program 112 times [2021-07-09 18:28:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:44,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513191728] [2021-07-09 18:28:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513191728] [2021-07-09 18:28:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513191728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655132111] [2021-07-09 18:28:44,295 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 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 [2021-07-09 18:28:44,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:44,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:44,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:44,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:44,500 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:28:44,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:44,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:44,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:44,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655132111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:44,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:44,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 18:28:44,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244050423] [2021-07-09 18:28:44,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:28:44,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:28:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:28:44,528 INFO L87 Difference]: Start difference. First operand 7433 states and 25360 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2021-07-09 18:28:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:44,946 INFO L93 Difference]: Finished difference Result 7974 states and 26897 transitions. [2021-07-09 18:28:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:28:44,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 30 [2021-07-09 18:28:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:44,962 INFO L225 Difference]: With dead ends: 7974 [2021-07-09 18:28:44,962 INFO L226 Difference]: Without dead ends: 7948 [2021-07-09 18:28:44,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:28:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-07-09 18:28:45,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7410. [2021-07-09 18:28:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4130112025914427) internal successors, (25287), 7409 states have internal predecessors, (25287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25287 transitions. [2021-07-09 18:28:45,100 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25287 transitions. Word has length 30 [2021-07-09 18:28:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:45,100 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25287 transitions. [2021-07-09 18:28:45,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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) [2021-07-09 18:28:45,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25287 transitions. [2021-07-09 18:28:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:45,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:45,112 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:45,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:45,312 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1252420240, now seen corresponding path program 113 times [2021-07-09 18:28:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:45,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141170268] [2021-07-09 18:28:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:45,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:45,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141170268] [2021-07-09 18:28:45,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141170268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:45,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255066697] [2021-07-09 18:28:45,512 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 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 [2021-07-09 18:28:45,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:28:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:45,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:45,732 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:28:45,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:45,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:45,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:45,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255066697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:45,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:45,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:28:45,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819687199] [2021-07-09 18:28:45,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:45,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:45,752 INFO L87 Difference]: Start difference. First operand 7410 states and 25287 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:47,106 INFO L93 Difference]: Finished difference Result 9196 states and 30718 transitions. [2021-07-09 18:28:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:28:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:47,159 INFO L225 Difference]: With dead ends: 9196 [2021-07-09 18:28:47,159 INFO L226 Difference]: Without dead ends: 9170 [2021-07-09 18:28:47,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 930.4ms TimeCoverageRelationStatistics Valid=309, Invalid=1853, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:28:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2021-07-09 18:28:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7390. [2021-07-09 18:28:47,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 3.4141291108404386) internal successors, (25227), 7389 states have internal predecessors, (25227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 25227 transitions. [2021-07-09 18:28:47,282 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 25227 transitions. Word has length 30 [2021-07-09 18:28:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:47,282 INFO L482 AbstractCegarLoop]: Abstraction has 7390 states and 25227 transitions. [2021-07-09 18:28:47,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 25227 transitions. [2021-07-09 18:28:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:47,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:47,294 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:47,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-07-09 18:28:47,494 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:47,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:47,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1782395603, now seen corresponding path program 34 times [2021-07-09 18:28:47,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:47,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197544382] [2021-07-09 18:28:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:47,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197544382] [2021-07-09 18:28:47,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197544382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:47,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965814449] [2021-07-09 18:28:47,580 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 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 [2021-07-09 18:28:47,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:47,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:28:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:47,701 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 19 treesize of output 11 [2021-07-09 18:28:47,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:47,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:47,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:28:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:47,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965814449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:47,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:47,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:28:47,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861325889] [2021-07-09 18:28:47,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:28:47,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:28:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:28:47,721 INFO L87 Difference]: Start difference. First operand 7390 states and 25227 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:28:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:47,918 INFO L93 Difference]: Finished difference Result 8178 states and 27562 transitions. [2021-07-09 18:28:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:28:47,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 30 [2021-07-09 18:28:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:47,934 INFO L225 Difference]: With dead ends: 8178 [2021-07-09 18:28:47,935 INFO L226 Difference]: Without dead ends: 8092 [2021-07-09 18:28:47,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:28:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2021-07-09 18:28:48,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 7410. [2021-07-09 18:28:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7410 states, 7409 states have (on average 3.4105817249291404) internal successors, (25269), 7409 states have internal predecessors, (25269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7410 states to 7410 states and 25269 transitions. [2021-07-09 18:28:48,053 INFO L78 Accepts]: Start accepts. Automaton has 7410 states and 25269 transitions. Word has length 30 [2021-07-09 18:28:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:48,053 INFO L482 AbstractCegarLoop]: Abstraction has 7410 states and 25269 transitions. [2021-07-09 18:28:48,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:28:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7410 states and 25269 transitions. [2021-07-09 18:28:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:48,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:48,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:48,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:48,265 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1423069146, now seen corresponding path program 114 times [2021-07-09 18:28:48,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:48,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267946533] [2021-07-09 18:28:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:48,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:48,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267946533] [2021-07-09 18:28:48,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267946533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:48,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205290778] [2021-07-09 18:28:48,489 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 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 [2021-07-09 18:28:48,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:28:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:28:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:48,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:48,700 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 19 treesize of output 19 [2021-07-09 18:28:48,701 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:48,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:48,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:48,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:28:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:48,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205290778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:48,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:48,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:28:48,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101409024] [2021-07-09 18:28:48,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:28:48,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:28:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:28:48,749 INFO L87 Difference]: Start difference. First operand 7410 states and 25269 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:51,086 INFO L93 Difference]: Finished difference Result 11711 states and 38605 transitions. [2021-07-09 18:28:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:28:51,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:51,111 INFO L225 Difference]: With dead ends: 11711 [2021-07-09 18:28:51,111 INFO L226 Difference]: Without dead ends: 11656 [2021-07-09 18:28:51,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 1663.0ms TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:28:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11656 states. [2021-07-09 18:28:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11656 to 7487. [2021-07-09 18:28:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7487 states, 7486 states have (on average 3.41170184344109) internal successors, (25540), 7486 states have internal predecessors, (25540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7487 states to 7487 states and 25540 transitions. [2021-07-09 18:28:51,292 INFO L78 Accepts]: Start accepts. Automaton has 7487 states and 25540 transitions. Word has length 30 [2021-07-09 18:28:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:51,292 INFO L482 AbstractCegarLoop]: Abstraction has 7487 states and 25540 transitions. [2021-07-09 18:28:51,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 7487 states and 25540 transitions. [2021-07-09 18:28:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:51,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:51,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:51,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:51,504 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1640634574, now seen corresponding path program 115 times [2021-07-09 18:28:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:51,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721424375] [2021-07-09 18:28:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:51,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721424375] [2021-07-09 18:28:51,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721424375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:51,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076782327] [2021-07-09 18:28:51,730 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 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 [2021-07-09 18:28:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:51,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:51,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:51,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:51,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:51,906 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 19 treesize of output 19 [2021-07-09 18:28:51,907 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:51,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:51,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:51,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:28:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:51,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076782327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:51,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:51,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:28:51,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501615130] [2021-07-09 18:28:51,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:51,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:51,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:51,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:51,956 INFO L87 Difference]: Start difference. First operand 7487 states and 25540 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-07-09 18:28:53,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:53,542 INFO L93 Difference]: Finished difference Result 10792 states and 35822 transitions. [2021-07-09 18:28:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:28:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-07-09 18:28:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:53,563 INFO L225 Difference]: With dead ends: 10792 [2021-07-09 18:28:53,563 INFO L226 Difference]: Without dead ends: 10735 [2021-07-09 18:28:53,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1322.3ms TimeCoverageRelationStatistics Valid=378, Invalid=2072, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:28:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-07-09 18:28:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 7475. [2021-07-09 18:28:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 7474 states have (on average 3.409017928819909) internal successors, (25479), 7474 states have internal predecessors, (25479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 25479 transitions. [2021-07-09 18:28:53,703 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 25479 transitions. Word has length 30 [2021-07-09 18:28:53,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:53,703 INFO L482 AbstractCegarLoop]: Abstraction has 7475 states and 25479 transitions. [2021-07-09 18:28:53,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-07-09 18:28:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 25479 transitions. [2021-07-09 18:28:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:53,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:53,714 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:53,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:53,915 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1876404162, now seen corresponding path program 116 times [2021-07-09 18:28:53,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:53,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197609273] [2021-07-09 18:28:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:54,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:54,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197609273] [2021-07-09 18:28:54,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197609273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:54,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295446251] [2021-07-09 18:28:54,113 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 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 [2021-07-09 18:28:54,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:28:54,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:54,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:54,288 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 19 treesize of output 19 [2021-07-09 18:28:54,289 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:28:54,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:54,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:54,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:28:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:54,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295446251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:54,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:54,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:28:54,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645393092] [2021-07-09 18:28:54,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:54,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:54,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:54,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:54,368 INFO L87 Difference]: Start difference. First operand 7475 states and 25479 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:55,317 INFO L93 Difference]: Finished difference Result 9562 states and 32103 transitions. [2021-07-09 18:28:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:28:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:28:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:55,369 INFO L225 Difference]: With dead ends: 9562 [2021-07-09 18:28:55,369 INFO L226 Difference]: Without dead ends: 9491 [2021-07-09 18:28:55,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:28:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2021-07-09 18:28:55,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7458. [2021-07-09 18:28:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7458 states, 7457 states have (on average 3.408072951589111) internal successors, (25414), 7457 states have internal predecessors, (25414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7458 states to 7458 states and 25414 transitions. [2021-07-09 18:28:55,486 INFO L78 Accepts]: Start accepts. Automaton has 7458 states and 25414 transitions. Word has length 30 [2021-07-09 18:28:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:55,486 INFO L482 AbstractCegarLoop]: Abstraction has 7458 states and 25414 transitions. [2021-07-09 18:28:55,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7458 states and 25414 transitions. [2021-07-09 18:28:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:55,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:55,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:55,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-09 18:28:55,697 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:55,697 INFO L82 PathProgramCache]: Analyzing trace with hash 54174113, now seen corresponding path program 35 times [2021-07-09 18:28:55,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:55,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107732337] [2021-07-09 18:28:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:55,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:55,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107732337] [2021-07-09 18:28:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107732337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668951125] [2021-07-09 18:28:55,793 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 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 [2021-07-09 18:28:55,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:28:55,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:55,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:28:55,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:55,908 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 19 treesize of output 11 [2021-07-09 18:28:55,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:55,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:55,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:55,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:28:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:55,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668951125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:55,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:55,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:28:55,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802278896] [2021-07-09 18:28:55,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:28:55,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:28:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:28:55,932 INFO L87 Difference]: Start difference. First operand 7458 states and 25414 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) [2021-07-09 18:28:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:56,106 INFO L93 Difference]: Finished difference Result 7805 states and 26445 transitions. [2021-07-09 18:28:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:28:56,106 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 30 [2021-07-09 18:28:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:56,122 INFO L225 Difference]: With dead ends: 7805 [2021-07-09 18:28:56,122 INFO L226 Difference]: Without dead ends: 7774 [2021-07-09 18:28:56,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:28:56,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-07-09 18:28:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7430. [2021-07-09 18:28:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7430 states, 7429 states have (on average 3.4109570601696055) internal successors, (25340), 7429 states have internal predecessors, (25340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:28:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7430 states to 7430 states and 25340 transitions. [2021-07-09 18:28:56,235 INFO L78 Accepts]: Start accepts. Automaton has 7430 states and 25340 transitions. Word has length 30 [2021-07-09 18:28:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:56,235 INFO L482 AbstractCegarLoop]: Abstraction has 7430 states and 25340 transitions. [2021-07-09 18:28:56,235 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) [2021-07-09 18:28:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7430 states and 25340 transitions. [2021-07-09 18:28:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:56,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:56,246 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:56,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:56,447 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2093501780, now seen corresponding path program 117 times [2021-07-09 18:28:56,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:56,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286956000] [2021-07-09 18:28:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:56,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:56,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286956000] [2021-07-09 18:28:56,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286956000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:56,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239513546] [2021-07-09 18:28:56,686 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 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 [2021-07-09 18:28:56,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:28:56,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:56,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:28:56,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:56,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:56,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:56,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:28:56,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:56,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:56,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:56,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:56,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239513546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:56,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:56,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:28:56,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783383158] [2021-07-09 18:28:56,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:28:56,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:28:56,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:28:56,912 INFO L87 Difference]: Start difference. First operand 7430 states and 25340 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:28:57,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:28:57,861 INFO L93 Difference]: Finished difference Result 9193 states and 30704 transitions. [2021-07-09 18:28:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:28:57,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:28:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:28:57,879 INFO L225 Difference]: With dead ends: 9193 [2021-07-09 18:28:57,879 INFO L226 Difference]: Without dead ends: 9160 [2021-07-09 18:28:57,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:28:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2021-07-09 18:28:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7443. [2021-07-09 18:28:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7443 states, 7442 states have (on average 3.4106423004568662) internal successors, (25382), 7442 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) [2021-07-09 18:28:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7443 states to 7443 states and 25382 transitions. [2021-07-09 18:28:58,005 INFO L78 Accepts]: Start accepts. Automaton has 7443 states and 25382 transitions. Word has length 30 [2021-07-09 18:28:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:28:58,005 INFO L482 AbstractCegarLoop]: Abstraction has 7443 states and 25382 transitions. [2021-07-09 18:28:58,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:28:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7443 states and 25382 transitions. [2021-07-09 18:28:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:28:58,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:28:58,017 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:28:58,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:28:58,217 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:28:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:28:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash 769171052, now seen corresponding path program 118 times [2021-07-09 18:28:58,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:28:58,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549242639] [2021-07-09 18:28:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:28:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:28:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:58,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:28:58,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549242639] [2021-07-09 18:28:58,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549242639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:58,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478026683] [2021-07-09 18:28:58,442 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 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 [2021-07-09 18:28:58,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:28:58,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:28:58,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:28:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:28:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:28:58,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:28:58,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:28:58,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:28:58,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:28:58,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:28:58,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:28:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:28:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478026683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:28:58,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:28:58,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:28:58,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031710876] [2021-07-09 18:28:58,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:28:58,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:28:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:28:58,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:28:58,682 INFO L87 Difference]: Start difference. First operand 7443 states and 25382 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:00,309 INFO L93 Difference]: Finished difference Result 9705 states and 32422 transitions. [2021-07-09 18:29:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:29:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:29:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:00,330 INFO L225 Difference]: With dead ends: 9705 [2021-07-09 18:29:00,330 INFO L226 Difference]: Without dead ends: 9672 [2021-07-09 18:29:00,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1245.7ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:29:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9672 states. [2021-07-09 18:29:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9672 to 7455. [2021-07-09 18:29:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 3.4097129058223774) internal successors, (25416), 7454 states have internal predecessors, (25416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 25416 transitions. [2021-07-09 18:29:00,469 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 25416 transitions. Word has length 30 [2021-07-09 18:29:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:00,469 INFO L482 AbstractCegarLoop]: Abstraction has 7455 states and 25416 transitions. [2021-07-09 18:29:00,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 25416 transitions. [2021-07-09 18:29:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:00,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:00,481 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:00,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-07-09 18:29:00,681 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2080023144, now seen corresponding path program 119 times [2021-07-09 18:29:00,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:00,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147252744] [2021-07-09 18:29:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:00,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147252744] [2021-07-09 18:29:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147252744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662847371] [2021-07-09 18:29:00,913 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 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 [2021-07-09 18:29:00,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:29:00,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:29:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:01,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:01,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-07-09 18:29:01,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:01,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:01,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:01,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:35 [2021-07-09 18:29:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:01,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662847371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:01,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:01,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:29:01,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455469623] [2021-07-09 18:29:01,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:29:01,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:29:01,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:29:01,248 INFO L87 Difference]: Start difference. First operand 7455 states and 25416 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2021-07-09 18:29:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:03,251 INFO L93 Difference]: Finished difference Result 10824 states and 35717 transitions. [2021-07-09 18:29:03,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:29:03,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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 30 [2021-07-09 18:29:03,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:03,273 INFO L225 Difference]: With dead ends: 10824 [2021-07-09 18:29:03,273 INFO L226 Difference]: Without dead ends: 10757 [2021-07-09 18:29:03,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1535.4ms TimeCoverageRelationStatistics Valid=469, Invalid=3191, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:29:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-07-09 18:29:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 7452. [2021-07-09 18:29:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7452 states, 7451 states have (on average 3.410146289088713) internal successors, (25409), 7451 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7452 states to 7452 states and 25409 transitions. [2021-07-09 18:29:03,434 INFO L78 Accepts]: Start accepts. Automaton has 7452 states and 25409 transitions. Word has length 30 [2021-07-09 18:29:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:03,434 INFO L482 AbstractCegarLoop]: Abstraction has 7452 states and 25409 transitions. [2021-07-09 18:29:03,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 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) [2021-07-09 18:29:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 7452 states and 25409 transitions. [2021-07-09 18:29:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:03,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:03,445 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:03,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:03,646 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:03,646 INFO L82 PathProgramCache]: Analyzing trace with hash 169988712, now seen corresponding path program 120 times [2021-07-09 18:29:03,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:03,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584822028] [2021-07-09 18:29:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:03,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:03,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584822028] [2021-07-09 18:29:03,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584822028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:03,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42330101] [2021-07-09 18:29:03,880 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 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 [2021-07-09 18:29:03,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:29:03,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:03,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:29:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:04,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:04,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:04,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:29:04,101 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:04,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:04,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:04,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:29:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:04,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42330101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:04,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:04,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:29:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459742169] [2021-07-09 18:29:04,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:29:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:04,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:29:04,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:29:04,159 INFO L87 Difference]: Start difference. First operand 7452 states and 25409 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:07,330 INFO L93 Difference]: Finished difference Result 11741 states and 38704 transitions. [2021-07-09 18:29:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-09 18:29:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:29:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:07,354 INFO L225 Difference]: With dead ends: 11741 [2021-07-09 18:29:07,354 INFO L226 Difference]: Without dead ends: 11682 [2021-07-09 18:29:07,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 2676.6ms TimeCoverageRelationStatistics Valid=1148, Invalid=6508, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:29:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-07-09 18:29:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7513. [2021-07-09 18:29:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7513 states, 7512 states have (on average 3.413738019169329) internal successors, (25644), 7512 states have internal predecessors, (25644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7513 states to 7513 states and 25644 transitions. [2021-07-09 18:29:07,508 INFO L78 Accepts]: Start accepts. Automaton has 7513 states and 25644 transitions. Word has length 30 [2021-07-09 18:29:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:07,508 INFO L482 AbstractCegarLoop]: Abstraction has 7513 states and 25644 transitions. [2021-07-09 18:29:07,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 7513 states and 25644 transitions. [2021-07-09 18:29:07,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:07,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:07,520 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:07,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-07-09 18:29:07,720 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1544008528, now seen corresponding path program 121 times [2021-07-09 18:29:07,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:07,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441261524] [2021-07-09 18:29:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:07,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441261524] [2021-07-09 18:29:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441261524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711845093] [2021-07-09 18:29:07,950 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 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 [2021-07-09 18:29:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:29:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:08,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:08,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:08,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:08,121 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 29 treesize of output 25 [2021-07-09 18:29:08,122 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:08,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:08,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:08,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:29:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:08,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711845093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:08,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:08,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:29:08,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618065928] [2021-07-09 18:29:08,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:29:08,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:29:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:29:08,192 INFO L87 Difference]: Start difference. First operand 7513 states and 25644 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:29:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:09,402 INFO L93 Difference]: Finished difference Result 11967 states and 39772 transitions. [2021-07-09 18:29:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:29:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:29:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:09,427 INFO L225 Difference]: With dead ends: 11967 [2021-07-09 18:29:09,427 INFO L226 Difference]: Without dead ends: 11882 [2021-07-09 18:29:09,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 981.4ms TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:29:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11882 states. [2021-07-09 18:29:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11882 to 7506. [2021-07-09 18:29:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7506 states, 7505 states have (on average 3.4131912058627583) internal successors, (25616), 7505 states have internal predecessors, (25616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7506 states to 7506 states and 25616 transitions. [2021-07-09 18:29:09,569 INFO L78 Accepts]: Start accepts. Automaton has 7506 states and 25616 transitions. Word has length 30 [2021-07-09 18:29:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:09,569 INFO L482 AbstractCegarLoop]: Abstraction has 7506 states and 25616 transitions. [2021-07-09 18:29:09,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:29:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7506 states and 25616 transitions. [2021-07-09 18:29:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:09,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:09,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:09,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:09,781 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:09,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1726792916, now seen corresponding path program 122 times [2021-07-09 18:29:09,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:09,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855097646] [2021-07-09 18:29:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:10,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855097646] [2021-07-09 18:29:10,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855097646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:10,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907858627] [2021-07-09 18:29:10,000 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 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 [2021-07-09 18:29:10,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:10,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:29:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:10,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:10,188 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 29 treesize of output 25 [2021-07-09 18:29:10,189 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:10,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:10,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:10,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:20 [2021-07-09 18:29:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:10,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907858627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:10,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:10,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:29:10,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50984019] [2021-07-09 18:29:10,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:29:10,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:29:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:29:10,260 INFO L87 Difference]: Start difference. First operand 7506 states and 25616 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:12,502 INFO L93 Difference]: Finished difference Result 12586 states and 41642 transitions. [2021-07-09 18:29:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:29:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:29:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:12,527 INFO L225 Difference]: With dead ends: 12586 [2021-07-09 18:29:12,527 INFO L226 Difference]: Without dead ends: 12498 [2021-07-09 18:29:12,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1842.0ms TimeCoverageRelationStatistics Valid=829, Invalid=4001, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:29:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12498 states. [2021-07-09 18:29:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12498 to 7581. [2021-07-09 18:29:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7581 states, 7580 states have (on average 3.4108179419525064) internal successors, (25854), 7580 states have internal predecessors, (25854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7581 states to 7581 states and 25854 transitions. [2021-07-09 18:29:12,692 INFO L78 Accepts]: Start accepts. Automaton has 7581 states and 25854 transitions. Word has length 30 [2021-07-09 18:29:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:12,693 INFO L482 AbstractCegarLoop]: Abstraction has 7581 states and 25854 transitions. [2021-07-09 18:29:12,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 7581 states and 25854 transitions. [2021-07-09 18:29:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:12,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:12,704 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:12,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:12,904 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:12,905 INFO L82 PathProgramCache]: Analyzing trace with hash -197397320, now seen corresponding path program 123 times [2021-07-09 18:29:12,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:12,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760609902] [2021-07-09 18:29:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:13,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760609902] [2021-07-09 18:29:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760609902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:13,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251724480] [2021-07-09 18:29:13,122 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 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 [2021-07-09 18:29:13,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:29:13,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:13,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:29:13,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:13,378 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-07-09 18:29:13,378 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 48 [2021-07-09 18:29:13,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:13,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:13,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:13,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:3 [2021-07-09 18:29:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:13,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251724480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:13,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:13,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:29:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347157460] [2021-07-09 18:29:13,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:29:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:13,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:29:13,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:29:13,406 INFO L87 Difference]: Start difference. First operand 7581 states and 25854 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:29:17,664 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-07-09 18:29:17,931 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-07-09 18:29:19,094 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-07-09 18:29:19,705 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-07-09 18:29:20,000 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-09 18:29:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:23,786 INFO L93 Difference]: Finished difference Result 10935 states and 36351 transitions. [2021-07-09 18:29:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:29:23,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:29:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:23,809 INFO L225 Difference]: With dead ends: 10935 [2021-07-09 18:29:23,809 INFO L226 Difference]: Without dead ends: 10909 [2021-07-09 18:29:23,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 4913.7ms TimeCoverageRelationStatistics Valid=713, Invalid=3978, Unknown=1, NotChecked=0, Total=4692 [2021-07-09 18:29:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-07-09 18:29:23,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 7589. [2021-07-09 18:29:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 3.411834475487612) internal successors, (25889), 7588 states have internal predecessors, (25889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 25889 transitions. [2021-07-09 18:29:23,945 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 25889 transitions. Word has length 30 [2021-07-09 18:29:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:23,945 INFO L482 AbstractCegarLoop]: Abstraction has 7589 states and 25889 transitions. [2021-07-09 18:29:23,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:29:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 25889 transitions. [2021-07-09 18:29:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:23,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:23,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:24,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-09 18:29:24,157 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 262838404, now seen corresponding path program 124 times [2021-07-09 18:29:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948331402] [2021-07-09 18:29:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:24,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948331402] [2021-07-09 18:29:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948331402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302355329] [2021-07-09 18:29:24,750 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 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 [2021-07-09 18:29:24,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:29:24,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:29:24,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:25,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:25,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:25,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,199 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 23 treesize of output 23 [2021-07-09 18:29:25,200 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:25,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:25,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:25,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:29:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:25,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302355329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:25,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:25,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:29:25,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683619456] [2021-07-09 18:29:25,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:29:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:29:25,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:29:25,378 INFO L87 Difference]: Start difference. First operand 7589 states and 25889 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:29:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:26,605 INFO L93 Difference]: Finished difference Result 9231 states and 31088 transitions. [2021-07-09 18:29:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:29:26,605 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-07-09 18:29:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:26,623 INFO L225 Difference]: With dead ends: 9231 [2021-07-09 18:29:26,624 INFO L226 Difference]: Without dead ends: 9196 [2021-07-09 18:29:26,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1407.8ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:29:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-07-09 18:29:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7585. [2021-07-09 18:29:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7585 states, 7584 states have (on average 3.411260548523207) internal successors, (25871), 7584 states have internal predecessors, (25871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7585 states to 7585 states and 25871 transitions. [2021-07-09 18:29:26,746 INFO L78 Accepts]: Start accepts. Automaton has 7585 states and 25871 transitions. Word has length 30 [2021-07-09 18:29:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:26,746 INFO L482 AbstractCegarLoop]: Abstraction has 7585 states and 25871 transitions. [2021-07-09 18:29:26,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:29:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7585 states and 25871 transitions. [2021-07-09 18:29:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:26,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:26,757 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:26,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:26,957 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:26,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1222250922, now seen corresponding path program 125 times [2021-07-09 18:29:26,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:26,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906706269] [2021-07-09 18:29:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:27,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:27,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906706269] [2021-07-09 18:29:27,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906706269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:27,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073468418] [2021-07-09 18:29:27,506 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 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 [2021-07-09 18:29:27,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:29:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:27,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:29:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:27,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:27,968 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 19 treesize of output 19 [2021-07-09 18:29:27,969 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:27,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:27,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:27,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:29:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:28,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073468418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:28,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:28,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:29:28,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883426567] [2021-07-09 18:29:28,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:29:28,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:29:28,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:29:28,076 INFO L87 Difference]: Start difference. First operand 7585 states and 25871 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:29:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:30,661 INFO L93 Difference]: Finished difference Result 9670 states and 32321 transitions. [2021-07-09 18:29:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:29:30,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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 30 [2021-07-09 18:29:30,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:30,680 INFO L225 Difference]: With dead ends: 9670 [2021-07-09 18:29:30,680 INFO L226 Difference]: Without dead ends: 9635 [2021-07-09 18:29:30,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1631.4ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:29:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-07-09 18:29:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 7577. [2021-07-09 18:29:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.4107708553326295) internal successors, (25840), 7576 states have internal predecessors, (25840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 25840 transitions. [2021-07-09 18:29:30,815 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 25840 transitions. Word has length 30 [2021-07-09 18:29:30,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:30,815 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 25840 transitions. [2021-07-09 18:29:30,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 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) [2021-07-09 18:29:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 25840 transitions. [2021-07-09 18:29:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:30,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:30,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:31,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-07-09 18:29:31,027 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1382773470, now seen corresponding path program 126 times [2021-07-09 18:29:31,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:31,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053917710] [2021-07-09 18:29:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:31,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:31,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053917710] [2021-07-09 18:29:31,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053917710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:31,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000359238] [2021-07-09 18:29:31,579 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 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 [2021-07-09 18:29:31,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:29:31,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:29:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:32,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:32,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:32,086 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 29 treesize of output 25 [2021-07-09 18:29:32,087 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:29:32,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:32,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:32,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:29:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:32,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000359238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:32,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:32,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:29:32,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209421117] [2021-07-09 18:29:32,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:29:32,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:32,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:29:32,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:29:32,280 INFO L87 Difference]: Start difference. First operand 7577 states and 25840 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:33,619 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-07-09 18:29:33,963 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-07-09 18:29:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:36,875 INFO L93 Difference]: Finished difference Result 9586 states and 32012 transitions. [2021-07-09 18:29:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:29:36,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:29:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:36,895 INFO L225 Difference]: With dead ends: 9586 [2021-07-09 18:29:36,895 INFO L226 Difference]: Without dead ends: 9518 [2021-07-09 18:29:36,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2823.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:29:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-07-09 18:29:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 7570. [2021-07-09 18:29:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7570 states, 7569 states have (on average 3.4089047430307833) internal successors, (25802), 7569 states have internal predecessors, (25802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7570 states to 7570 states and 25802 transitions. [2021-07-09 18:29:37,023 INFO L78 Accepts]: Start accepts. Automaton has 7570 states and 25802 transitions. Word has length 30 [2021-07-09 18:29:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:37,023 INFO L482 AbstractCegarLoop]: Abstraction has 7570 states and 25802 transitions. [2021-07-09 18:29:37,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7570 states and 25802 transitions. [2021-07-09 18:29:37,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:37,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:37,034 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:37,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:37,235 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:37,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:37,235 INFO L82 PathProgramCache]: Analyzing trace with hash -692066666, now seen corresponding path program 127 times [2021-07-09 18:29:37,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:37,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898059949] [2021-07-09 18:29:37,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:37,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:37,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898059949] [2021-07-09 18:29:37,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898059949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:37,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184181216] [2021-07-09 18:29:37,819 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 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 [2021-07-09 18:29:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:29:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:38,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:29:38,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:38,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:38,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:38,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:29:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:38,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184181216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:38,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:29:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068337660] [2021-07-09 18:29:38,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:29:38,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:38,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:29:38,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:29:38,427 INFO L87 Difference]: Start difference. First operand 7570 states and 25802 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:29:38,937 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-07-09 18:29:39,792 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-07-09 18:29:40,261 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-07-09 18:29:40,674 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-07-09 18:29:42,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:42,810 INFO L93 Difference]: Finished difference Result 11143 states and 37083 transitions. [2021-07-09 18:29:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:29:42,811 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-09 18:29:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:42,833 INFO L225 Difference]: With dead ends: 11143 [2021-07-09 18:29:42,833 INFO L226 Difference]: Without dead ends: 11122 [2021-07-09 18:29:42,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 3657.7ms TimeCoverageRelationStatistics Valid=478, Invalid=2492, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:29:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11122 states. [2021-07-09 18:29:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11122 to 7564. [2021-07-09 18:29:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7564 states, 7563 states have (on average 3.4084358058971307) internal successors, (25778), 7563 states have internal predecessors, (25778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7564 states to 7564 states and 25778 transitions. [2021-07-09 18:29:42,969 INFO L78 Accepts]: Start accepts. Automaton has 7564 states and 25778 transitions. Word has length 30 [2021-07-09 18:29:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:42,969 INFO L482 AbstractCegarLoop]: Abstraction has 7564 states and 25778 transitions. [2021-07-09 18:29:42,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:29:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 7564 states and 25778 transitions. [2021-07-09 18:29:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:42,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:42,980 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:43,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:29:43,180 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -66350155, now seen corresponding path program 36 times [2021-07-09 18:29:43,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:43,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406808976] [2021-07-09 18:29:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:43,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406808976] [2021-07-09 18:29:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406808976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036963311] [2021-07-09 18:29:43,465 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 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 [2021-07-09 18:29:43,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:29:43,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:29:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:43,732 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 19 treesize of output 11 [2021-07-09 18:29:43,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:43,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:43,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:43,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:29:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:43,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036963311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:43,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:43,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:29:43,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724721558] [2021-07-09 18:29:43,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:29:43,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:29:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:29:43,765 INFO L87 Difference]: Start difference. First operand 7564 states and 25778 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:29:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:44,331 INFO L93 Difference]: Finished difference Result 7890 states and 26740 transitions. [2021-07-09 18:29:44,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:29:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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 30 [2021-07-09 18:29:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:44,347 INFO L225 Difference]: With dead ends: 7890 [2021-07-09 18:29:44,347 INFO L226 Difference]: Without dead ends: 7861 [2021-07-09 18:29:44,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:29:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2021-07-09 18:29:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 7612. [2021-07-09 18:29:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7612 states, 7611 states have (on average 3.408487715149126) internal successors, (25942), 7611 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7612 states to 7612 states and 25942 transitions. [2021-07-09 18:29:44,457 INFO L78 Accepts]: Start accepts. Automaton has 7612 states and 25942 transitions. Word has length 30 [2021-07-09 18:29:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:44,457 INFO L482 AbstractCegarLoop]: Abstraction has 7612 states and 25942 transitions. [2021-07-09 18:29:44,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 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) [2021-07-09 18:29:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 7612 states and 25942 transitions. [2021-07-09 18:29:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:44,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:44,468 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:44,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-09 18:29:44,668 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1138574553, now seen corresponding path program 37 times [2021-07-09 18:29:44,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:44,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549962979] [2021-07-09 18:29:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:44,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549962979] [2021-07-09 18:29:44,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549962979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158589582] [2021-07-09 18:29:44,988 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 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 [2021-07-09 18:29:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:29:45,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:45,292 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 19 treesize of output 11 [2021-07-09 18:29:45,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:45,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:45,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:45,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:29:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158589582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:45,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:45,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:29:45,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800745263] [2021-07-09 18:29:45,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:29:45,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:29:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:29:45,330 INFO L87 Difference]: Start difference. First operand 7612 states and 25942 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) [2021-07-09 18:29:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:45,912 INFO L93 Difference]: Finished difference Result 7964 states and 26982 transitions. [2021-07-09 18:29:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:29:45,912 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 30 [2021-07-09 18:29:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:45,928 INFO L225 Difference]: With dead ends: 7964 [2021-07-09 18:29:45,928 INFO L226 Difference]: Without dead ends: 7927 [2021-07-09 18:29:45,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:29:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-07-09 18:29:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7628. [2021-07-09 18:29:46,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7628 states, 7627 states have (on average 3.4081552379703686) internal successors, (25994), 7627 states have internal predecessors, (25994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7628 states to 7628 states and 25994 transitions. [2021-07-09 18:29:46,038 INFO L78 Accepts]: Start accepts. Automaton has 7628 states and 25994 transitions. Word has length 30 [2021-07-09 18:29:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:46,038 INFO L482 AbstractCegarLoop]: Abstraction has 7628 states and 25994 transitions. [2021-07-09 18:29:46,038 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) [2021-07-09 18:29:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7628 states and 25994 transitions. [2021-07-09 18:29:46,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:46,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:46,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:46,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-07-09 18:29:46,250 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash -427658407, now seen corresponding path program 38 times [2021-07-09 18:29:46,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:46,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876497560] [2021-07-09 18:29:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:46,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:46,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876497560] [2021-07-09 18:29:46,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876497560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:46,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252941794] [2021-07-09 18:29:46,521 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 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 [2021-07-09 18:29:46,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:46,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:29:46,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:46,793 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 19 treesize of output 11 [2021-07-09 18:29:46,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:46,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:46,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:46,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-09 18:29:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:46,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252941794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:46,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:46,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:29:46,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095837951] [2021-07-09 18:29:46,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:29:46,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:29:46,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:29:46,829 INFO L87 Difference]: Start difference. First operand 7628 states and 25994 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) [2021-07-09 18:29:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:47,528 INFO L93 Difference]: Finished difference Result 8177 states and 27650 transitions. [2021-07-09 18:29:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:29:47,529 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 30 [2021-07-09 18:29:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:47,545 INFO L225 Difference]: With dead ends: 8177 [2021-07-09 18:29:47,545 INFO L226 Difference]: Without dead ends: 8140 [2021-07-09 18:29:47,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 618.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:29:47,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8140 states. [2021-07-09 18:29:47,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8140 to 7656. [2021-07-09 18:29:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7656 states, 7655 states have (on average 3.4082299150881776) internal successors, (26090), 7655 states have internal predecessors, (26090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7656 states to 7656 states and 26090 transitions. [2021-07-09 18:29:47,665 INFO L78 Accepts]: Start accepts. Automaton has 7656 states and 26090 transitions. Word has length 30 [2021-07-09 18:29:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:47,665 INFO L482 AbstractCegarLoop]: Abstraction has 7656 states and 26090 transitions. [2021-07-09 18:29:47,666 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) [2021-07-09 18:29:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 7656 states and 26090 transitions. [2021-07-09 18:29:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:47,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:47,678 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:47,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-07-09 18:29:47,878 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:47,878 INFO L82 PathProgramCache]: Analyzing trace with hash 53555180, now seen corresponding path program 128 times [2021-07-09 18:29:47,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:47,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835208802] [2021-07-09 18:29:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:48,407 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-09 18:29:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:48,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:48,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835208802] [2021-07-09 18:29:48,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835208802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:48,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813733373] [2021-07-09 18:29:48,537 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 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 [2021-07-09 18:29:48,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:29:48,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:29:48,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:29:49,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:29:49,122 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 19 treesize of output 11 [2021-07-09 18:29:49,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:29:49,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:49,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:49,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:29:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:49,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813733373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:49,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:49,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:29:49,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237144712] [2021-07-09 18:29:49,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:29:49,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:29:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:29:49,172 INFO L87 Difference]: Start difference. First operand 7656 states and 26090 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:29:52,711 INFO L93 Difference]: Finished difference Result 9529 states and 31968 transitions. [2021-07-09 18:29:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:29:52,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:29:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:29:52,731 INFO L225 Difference]: With dead ends: 9529 [2021-07-09 18:29:52,732 INFO L226 Difference]: Without dead ends: 9497 [2021-07-09 18:29:52,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2624.7ms TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:29:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-07-09 18:29:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 7679. [2021-07-09 18:29:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7679 states, 7678 states have (on average 3.40739775983329) internal successors, (26162), 7678 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7679 states to 7679 states and 26162 transitions. [2021-07-09 18:29:52,870 INFO L78 Accepts]: Start accepts. Automaton has 7679 states and 26162 transitions. Word has length 30 [2021-07-09 18:29:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:29:52,870 INFO L482 AbstractCegarLoop]: Abstraction has 7679 states and 26162 transitions. [2021-07-09 18:29:52,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7679 states and 26162 transitions. [2021-07-09 18:29:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:29:52,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:29:52,882 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:29:53,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-09 18:29:53,083 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:29:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:29:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -920787924, now seen corresponding path program 129 times [2021-07-09 18:29:53,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:29:53,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109140768] [2021-07-09 18:29:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:29:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:29:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:53,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:29:53,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109140768] [2021-07-09 18:29:53,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109140768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:53,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970691798] [2021-07-09 18:29:53,772 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 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 [2021-07-09 18:29:53,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:29:53,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:29:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:29:53,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:29:54,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:54,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-07-09 18:29:54,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:29:54,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:29:54,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:29:54,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:156 [2021-07-09 18:29:54,881 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 18:29:55,659 WARN L205 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:29:55,998 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-09 18:29:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:29:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970691798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:29:56,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:29:56,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:29:56,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415747862] [2021-07-09 18:29:56,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:29:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:29:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:29:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:29:56,046 INFO L87 Difference]: Start difference. First operand 7679 states and 26162 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:29:56,941 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 19 [2021-07-09 18:29:57,129 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 18 [2021-07-09 18:29:57,308 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2021-07-09 18:29:58,088 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-07-09 18:29:58,362 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-07-09 18:29:58,733 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 25 [2021-07-09 18:29:59,100 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 22 [2021-07-09 18:30:00,012 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2021-07-09 18:30:00,351 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2021-07-09 18:30:01,050 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-07-09 18:30:01,582 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2021-07-09 18:30:01,823 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 23 [2021-07-09 18:30:02,143 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 32 [2021-07-09 18:30:02,759 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2021-07-09 18:30:03,485 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-07-09 18:30:04,309 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-07-09 18:30:04,690 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-09 18:30:05,246 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-07-09 18:30:05,763 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2021-07-09 18:30:06,045 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 22 [2021-07-09 18:30:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:06,214 INFO L93 Difference]: Finished difference Result 10868 states and 36318 transitions. [2021-07-09 18:30:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:30:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:30:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:06,237 INFO L225 Difference]: With dead ends: 10868 [2021-07-09 18:30:06,237 INFO L226 Difference]: Without dead ends: 10793 [2021-07-09 18:30:06,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 10045.3ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:30:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10793 states. [2021-07-09 18:30:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10793 to 7682. [2021-07-09 18:30:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7682 states, 7681 states have (on average 3.406587683895326) internal successors, (26166), 7681 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7682 states to 7682 states and 26166 transitions. [2021-07-09 18:30:06,418 INFO L78 Accepts]: Start accepts. Automaton has 7682 states and 26166 transitions. Word has length 30 [2021-07-09 18:30:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:06,418 INFO L482 AbstractCegarLoop]: Abstraction has 7682 states and 26166 transitions. [2021-07-09 18:30:06,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7682 states and 26166 transitions. [2021-07-09 18:30:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:06,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:06,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:06,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:06,630 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:06,631 INFO L82 PathProgramCache]: Analyzing trace with hash 306904492, now seen corresponding path program 130 times [2021-07-09 18:30:06,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:06,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557457564] [2021-07-09 18:30:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:07,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:07,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557457564] [2021-07-09 18:30:07,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557457564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:07,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887718080] [2021-07-09 18:30:07,088 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 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 [2021-07-09 18:30:07,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:07,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:07,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:07,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:07,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:30:07,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:07,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:07,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:07,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:30:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:07,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887718080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:07,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:07,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:30:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172808364] [2021-07-09 18:30:07,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:30:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:30:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:30:07,733 INFO L87 Difference]: Start difference. First operand 7682 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:30:10,177 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-07-09 18:30:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:10,820 INFO L93 Difference]: Finished difference Result 10040 states and 33750 transitions. [2021-07-09 18:30:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:30:10,820 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:30:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:10,841 INFO L225 Difference]: With dead ends: 10040 [2021-07-09 18:30:10,842 INFO L226 Difference]: Without dead ends: 9989 [2021-07-09 18:30:10,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2198.9ms TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:30:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-07-09 18:30:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 7724. [2021-07-09 18:30:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7724 states, 7723 states have (on average 3.4080020717337822) internal successors, (26320), 7723 states have internal predecessors, (26320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7724 states to 7724 states and 26320 transitions. [2021-07-09 18:30:10,984 INFO L78 Accepts]: Start accepts. Automaton has 7724 states and 26320 transitions. Word has length 30 [2021-07-09 18:30:10,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:10,984 INFO L482 AbstractCegarLoop]: Abstraction has 7724 states and 26320 transitions. [2021-07-09 18:30:10,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:30:10,984 INFO L276 IsEmpty]: Start isEmpty. Operand 7724 states and 26320 transitions. [2021-07-09 18:30:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:10,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:10,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:11,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-07-09 18:30:11,196 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:11,197 INFO L82 PathProgramCache]: Analyzing trace with hash 861731688, now seen corresponding path program 131 times [2021-07-09 18:30:11,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127077304] [2021-07-09 18:30:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:11,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:11,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127077304] [2021-07-09 18:30:11,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127077304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:11,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620196420] [2021-07-09 18:30:11,863 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 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 [2021-07-09 18:30:11,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:30:11,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:11,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:11,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:12,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:12,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:30:12,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:12,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:12,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:12,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:30:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:12,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620196420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:12,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:12,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:30:12,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525589562] [2021-07-09 18:30:12,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:30:12,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:12,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:30:12,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:30:12,650 INFO L87 Difference]: Start difference. First operand 7724 states and 26320 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:30:13,825 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-09 18:30:14,266 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-09 18:30:14,976 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-09 18:30:15,508 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-09 18:30:16,222 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-07-09 18:30:16,704 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-07-09 18:30:17,391 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-07-09 18:30:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:18,045 INFO L93 Difference]: Finished difference Result 10471 states and 35019 transitions. [2021-07-09 18:30:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:30:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:30:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:18,068 INFO L225 Difference]: With dead ends: 10471 [2021-07-09 18:30:18,068 INFO L226 Difference]: Without dead ends: 10435 [2021-07-09 18:30:18,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 4217.4ms TimeCoverageRelationStatistics Valid=405, Invalid=2351, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:30:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-07-09 18:30:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 7741. [2021-07-09 18:30:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7741 states, 7740 states have (on average 3.4059431524547805) internal successors, (26362), 7740 states have internal predecessors, (26362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7741 states to 7741 states and 26362 transitions. [2021-07-09 18:30:18,229 INFO L78 Accepts]: Start accepts. Automaton has 7741 states and 26362 transitions. Word has length 30 [2021-07-09 18:30:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:18,229 INFO L482 AbstractCegarLoop]: Abstraction has 7741 states and 26362 transitions. [2021-07-09 18:30:18,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:30:18,230 INFO L276 IsEmpty]: Start isEmpty. Operand 7741 states and 26362 transitions. [2021-07-09 18:30:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:18,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:18,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:18,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable574,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:18,442 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -806581072, now seen corresponding path program 132 times [2021-07-09 18:30:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:18,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291173887] [2021-07-09 18:30:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:19,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:19,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291173887] [2021-07-09 18:30:19,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291173887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:19,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862484904] [2021-07-09 18:30:19,165 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 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 [2021-07-09 18:30:19,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:30:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:19,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:19,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:19,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:19,705 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 19 treesize of output 19 [2021-07-09 18:30:19,706 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:19,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:19,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:19,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:30:19,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:19,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862484904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:19,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:19,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:30:19,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5203570] [2021-07-09 18:30:19,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:30:19,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:30:19,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:30:19,839 INFO L87 Difference]: Start difference. First operand 7741 states and 26362 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:30:20,904 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-07-09 18:30:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:24,229 INFO L93 Difference]: Finished difference Result 10347 states and 34526 transitions. [2021-07-09 18:30:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:30:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-09 18:30:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:24,251 INFO L225 Difference]: With dead ends: 10347 [2021-07-09 18:30:24,251 INFO L226 Difference]: Without dead ends: 10275 [2021-07-09 18:30:24,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2586.5ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:30:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2021-07-09 18:30:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 7692. [2021-07-09 18:30:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4054089195163177) internal successors, (26191), 7691 states have internal predecessors, (26191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26191 transitions. [2021-07-09 18:30:24,388 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26191 transitions. Word has length 30 [2021-07-09 18:30:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:24,388 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26191 transitions. [2021-07-09 18:30:24,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:30:24,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26191 transitions. [2021-07-09 18:30:24,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:24,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:24,400 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:24,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-09 18:30:24,601 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:24,601 INFO L82 PathProgramCache]: Analyzing trace with hash -697524088, now seen corresponding path program 133 times [2021-07-09 18:30:24,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:24,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344188000] [2021-07-09 18:30:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:25,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:25,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344188000] [2021-07-09 18:30:25,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344188000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:25,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690512533] [2021-07-09 18:30:25,212 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 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 [2021-07-09 18:30:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:25,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:25,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:25,824 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 19 treesize of output 11 [2021-07-09 18:30:25,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:25,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:25,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:25,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:30:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:25,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690512533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:25,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:25,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:30:25,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374728036] [2021-07-09 18:30:25,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:30:25,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:25,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:30:25,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:30:25,871 INFO L87 Difference]: Start difference. First operand 7692 states and 26191 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:30:26,071 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-07-09 18:30:26,226 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:30:26,579 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-07-09 18:30:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:28,492 INFO L93 Difference]: Finished difference Result 9596 states and 32348 transitions. [2021-07-09 18:30:28,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:30:28,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:30:28,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:28,512 INFO L225 Difference]: With dead ends: 9596 [2021-07-09 18:30:28,513 INFO L226 Difference]: Without dead ends: 9581 [2021-07-09 18:30:28,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1951.7ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:30:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9581 states. [2021-07-09 18:30:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9581 to 7697. [2021-07-09 18:30:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.4056652806652807) internal successors, (26210), 7696 states have internal predecessors, (26210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26210 transitions. [2021-07-09 18:30:28,676 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26210 transitions. Word has length 30 [2021-07-09 18:30:28,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:28,676 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26210 transitions. [2021-07-09 18:30:28,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:30:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26210 transitions. [2021-07-09 18:30:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:28,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:28,689 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:28,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:28,889 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:28,889 INFO L82 PathProgramCache]: Analyzing trace with hash -951187922, now seen corresponding path program 134 times [2021-07-09 18:30:28,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:28,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701155871] [2021-07-09 18:30:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:29,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:29,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701155871] [2021-07-09 18:30:29,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701155871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:29,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219876284] [2021-07-09 18:30:29,486 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 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 [2021-07-09 18:30:29,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:29,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:30,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:30,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,055 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 19 treesize of output 19 [2021-07-09 18:30:30,057 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:30,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:30,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:30,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:30:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219876284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:30,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:30,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:30:30,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012271841] [2021-07-09 18:30:30,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:30:30,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:30:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:30:30,198 INFO L87 Difference]: Start difference. First operand 7697 states and 26210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:30:30,385 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-07-09 18:30:30,556 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-07-09 18:30:30,851 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-09 18:30:32,040 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-07-09 18:30:32,260 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-07-09 18:30:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:33,229 INFO L93 Difference]: Finished difference Result 9964 states and 33540 transitions. [2021-07-09 18:30:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:30:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:30:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:33,251 INFO L225 Difference]: With dead ends: 9964 [2021-07-09 18:30:33,251 INFO L226 Difference]: Without dead ends: 9949 [2021-07-09 18:30:33,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2447.2ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:30:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2021-07-09 18:30:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 7694. [2021-07-09 18:30:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7694 states, 7693 states have (on average 3.4053035226829587) internal successors, (26197), 7693 states have internal predecessors, (26197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7694 states to 7694 states and 26197 transitions. [2021-07-09 18:30:33,447 INFO L78 Accepts]: Start accepts. Automaton has 7694 states and 26197 transitions. Word has length 30 [2021-07-09 18:30:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:33,447 INFO L482 AbstractCegarLoop]: Abstraction has 7694 states and 26197 transitions. [2021-07-09 18:30:33,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:30:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7694 states and 26197 transitions. [2021-07-09 18:30:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:33,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:33,460 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:33,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-07-09 18:30:33,660 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1739005664, now seen corresponding path program 135 times [2021-07-09 18:30:33,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:33,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572230914] [2021-07-09 18:30:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:34,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:34,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572230914] [2021-07-09 18:30:34,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572230914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:34,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736681621] [2021-07-09 18:30:34,319 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 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 [2021-07-09 18:30:34,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:30:34,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:30:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:34,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:30:34,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:30:34,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:30:34,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:34,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:34,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-09 18:30:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:35,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736681621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:35,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:35,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:30:35,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617993202] [2021-07-09 18:30:35,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:30:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:30:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:30:35,034 INFO L87 Difference]: Start difference. First operand 7694 states and 26197 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:30:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:36,647 INFO L93 Difference]: Finished difference Result 9270 states and 31237 transitions. [2021-07-09 18:30:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:30:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:30:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:36,667 INFO L225 Difference]: With dead ends: 9270 [2021-07-09 18:30:36,667 INFO L226 Difference]: Without dead ends: 9255 [2021-07-09 18:30:36,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1477.2ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:30:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-07-09 18:30:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7697. [2021-07-09 18:30:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7697 states, 7696 states have (on average 3.405535343035343) internal successors, (26209), 7696 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7697 states to 7697 states and 26209 transitions. [2021-07-09 18:30:36,796 INFO L78 Accepts]: Start accepts. Automaton has 7697 states and 26209 transitions. Word has length 30 [2021-07-09 18:30:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:36,796 INFO L482 AbstractCegarLoop]: Abstraction has 7697 states and 26209 transitions. [2021-07-09 18:30:36,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:30:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 7697 states and 26209 transitions. [2021-07-09 18:30:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:36,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:36,809 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:37,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:37,009 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:37,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1234861006, now seen corresponding path program 136 times [2021-07-09 18:30:37,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:37,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218088343] [2021-07-09 18:30:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:37,613 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-07-09 18:30:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:37,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218088343] [2021-07-09 18:30:37,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218088343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460020317] [2021-07-09 18:30:37,745 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 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 [2021-07-09 18:30:37,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:30:37,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:38,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:38,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,352 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 19 treesize of output 19 [2021-07-09 18:30:38,354 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:38,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:38,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:38,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:30:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:38,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460020317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:38,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:38,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:30:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801373462] [2021-07-09 18:30:38,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:30:38,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:38,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:30:38,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:30:38,505 INFO L87 Difference]: Start difference. First operand 7697 states and 26209 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:30:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:40,598 INFO L93 Difference]: Finished difference Result 9829 states and 33022 transitions. [2021-07-09 18:30:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:30:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:30:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:40,619 INFO L225 Difference]: With dead ends: 9829 [2021-07-09 18:30:40,619 INFO L226 Difference]: Without dead ends: 9810 [2021-07-09 18:30:40,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1875.0ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:30:40,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9810 states. [2021-07-09 18:30:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9810 to 7693. [2021-07-09 18:30:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7693 states, 7692 states have (on average 3.40535621424857) internal successors, (26194), 7692 states have internal predecessors, (26194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7693 states to 7693 states and 26194 transitions. [2021-07-09 18:30:40,768 INFO L78 Accepts]: Start accepts. Automaton has 7693 states and 26194 transitions. Word has length 30 [2021-07-09 18:30:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:40,768 INFO L482 AbstractCegarLoop]: Abstraction has 7693 states and 26194 transitions. [2021-07-09 18:30:40,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:30:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 7693 states and 26194 transitions. [2021-07-09 18:30:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:40,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:40,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:40,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:40,981 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1901077732, now seen corresponding path program 137 times [2021-07-09 18:30:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:40,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323681312] [2021-07-09 18:30:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:41,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323681312] [2021-07-09 18:30:41,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323681312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:41,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571274548] [2021-07-09 18:30:41,582 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 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 [2021-07-09 18:30:41,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:30:41,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:41,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:42,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:42,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:42,110 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 19 treesize of output 19 [2021-07-09 18:30:42,111 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:42,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:42,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:42,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:30:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:42,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571274548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:42,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:42,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:30:42,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595606370] [2021-07-09 18:30:42,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:30:42,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:30:42,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:30:42,369 INFO L87 Difference]: Start difference. First operand 7693 states and 26194 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:30:43,678 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 18:30:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:45,601 INFO L93 Difference]: Finished difference Result 9812 states and 32964 transitions. [2021-07-09 18:30:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:30:45,602 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-07-09 18:30:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:45,623 INFO L225 Difference]: With dead ends: 9812 [2021-07-09 18:30:45,623 INFO L226 Difference]: Without dead ends: 9774 [2021-07-09 18:30:45,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2325.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:30:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-07-09 18:30:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 7691. [2021-07-09 18:30:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7691 states, 7690 states have (on average 3.4054616384915475) internal successors, (26188), 7690 states have internal predecessors, (26188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7691 states to 7691 states and 26188 transitions. [2021-07-09 18:30:45,758 INFO L78 Accepts]: Start accepts. Automaton has 7691 states and 26188 transitions. Word has length 30 [2021-07-09 18:30:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:45,758 INFO L482 AbstractCegarLoop]: Abstraction has 7691 states and 26188 transitions. [2021-07-09 18:30:45,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:30:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 7691 states and 26188 transitions. [2021-07-09 18:30:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:45,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:45,770 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:45,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-07-09 18:30:45,970 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash 78542928, now seen corresponding path program 138 times [2021-07-09 18:30:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:45,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834263936] [2021-07-09 18:30:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:46,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834263936] [2021-07-09 18:30:46,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834263936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:46,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787471322] [2021-07-09 18:30:46,624 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 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 [2021-07-09 18:30:46,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:30:46,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:30:46,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:47,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:47,109 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 23 treesize of output 23 [2021-07-09 18:30:47,111 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:47,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:47,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:47,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:30:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:47,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787471322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:47,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:47,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:30:47,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4822690] [2021-07-09 18:30:47,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:30:47,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:47,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:30:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:30:47,317 INFO L87 Difference]: Start difference. First operand 7691 states and 26188 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) [2021-07-09 18:30:49,490 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-09 18:30:49,765 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-09 18:30:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:51,996 INFO L93 Difference]: Finished difference Result 9869 states and 33063 transitions. [2021-07-09 18:30:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:30:51,997 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 30 [2021-07-09 18:30:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:52,018 INFO L225 Difference]: With dead ends: 9869 [2021-07-09 18:30:52,018 INFO L226 Difference]: Without dead ends: 9833 [2021-07-09 18:30:52,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3138.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:30:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9833 states. [2021-07-09 18:30:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9833 to 7688. [2021-07-09 18:30:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7688 states, 7687 states have (on average 3.4041888903343307) internal successors, (26168), 7687 states have internal predecessors, (26168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 26168 transitions. [2021-07-09 18:30:52,159 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 26168 transitions. Word has length 30 [2021-07-09 18:30:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:52,159 INFO L482 AbstractCegarLoop]: Abstraction has 7688 states and 26168 transitions. [2021-07-09 18:30:52,159 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) [2021-07-09 18:30:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 26168 transitions. [2021-07-09 18:30:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:52,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:52,171 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:52,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-09 18:30:52,385 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1358479268, now seen corresponding path program 139 times [2021-07-09 18:30:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:52,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748418507] [2021-07-09 18:30:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:53,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:53,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748418507] [2021-07-09 18:30:53,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748418507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:53,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161737024] [2021-07-09 18:30:53,060 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 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 [2021-07-09 18:30:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:53,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:30:53,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:53,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:53,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:53,620 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 19 treesize of output 19 [2021-07-09 18:30:53,622 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:53,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:53,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:53,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:30:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:53,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161737024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:53,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:53,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:30:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876039726] [2021-07-09 18:30:53,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:30:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:30:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:30:53,768 INFO L87 Difference]: Start difference. First operand 7688 states and 26168 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:30:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:56,085 INFO L93 Difference]: Finished difference Result 10287 states and 34404 transitions. [2021-07-09 18:30:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:30:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:30:56,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:56,106 INFO L225 Difference]: With dead ends: 10287 [2021-07-09 18:30:56,106 INFO L226 Difference]: Without dead ends: 10237 [2021-07-09 18:30:56,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1823.6ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:30:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-07-09 18:30:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 7690. [2021-07-09 18:30:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.404343867863181) internal successors, (26176), 7689 states have internal predecessors, (26176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26176 transitions. [2021-07-09 18:30:56,249 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26176 transitions. Word has length 30 [2021-07-09 18:30:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:56,249 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26176 transitions. [2021-07-09 18:30:56,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:30:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26176 transitions. [2021-07-09 18:30:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:56,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:56,261 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:56,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-09 18:30:56,461 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash -268655640, now seen corresponding path program 140 times [2021-07-09 18:30:56,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:56,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042953191] [2021-07-09 18:30:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:30:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:57,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:30:57,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042953191] [2021-07-09 18:30:57,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042953191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:57,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556143114] [2021-07-09 18:30:57,063 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 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 [2021-07-09 18:30:57,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:30:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:30:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:30:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:30:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:30:57,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:57,502 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 29 treesize of output 25 [2021-07-09 18:30:57,503 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:30:57,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:30:57,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:30:57,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:30:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:30:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556143114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:30:57,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:30:57,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:30:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463639886] [2021-07-09 18:30:57,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:30:57,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:30:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:30:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:30:57,671 INFO L87 Difference]: Start difference. First operand 7690 states and 26176 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-07-09 18:30:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:30:59,191 INFO L93 Difference]: Finished difference Result 9773 states and 32852 transitions. [2021-07-09 18:30:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:30:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 30 [2021-07-09 18:30:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:30:59,211 INFO L225 Difference]: With dead ends: 9773 [2021-07-09 18:30:59,212 INFO L226 Difference]: Without dead ends: 9749 [2021-07-09 18:30:59,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1364.4ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:30:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9749 states. [2021-07-09 18:30:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9749 to 7684. [2021-07-09 18:30:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7684 states, 7683 states have (on average 3.404139008199922) internal successors, (26154), 7683 states have internal predecessors, (26154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:30:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7684 states to 7684 states and 26154 transitions. [2021-07-09 18:30:59,341 INFO L78 Accepts]: Start accepts. Automaton has 7684 states and 26154 transitions. Word has length 30 [2021-07-09 18:30:59,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:30:59,341 INFO L482 AbstractCegarLoop]: Abstraction has 7684 states and 26154 transitions. [2021-07-09 18:30:59,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-07-09 18:30:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7684 states and 26154 transitions. [2021-07-09 18:30:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:30:59,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:30:59,353 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:30:59,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:30:59,553 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:30:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:30:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1727704690, now seen corresponding path program 141 times [2021-07-09 18:30:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:30:59,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188012800] [2021-07-09 18:30:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:30:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:00,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188012800] [2021-07-09 18:31:00,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188012800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:00,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126763018] [2021-07-09 18:31:00,163 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 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 [2021-07-09 18:31:00,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:31:00,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:31:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:00,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:31:00,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:00,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:00,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-09 18:31:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:00,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126763018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:00,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:00,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:31:00,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905530977] [2021-07-09 18:31:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:31:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:00,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:31:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:31:00,871 INFO L87 Difference]: Start difference. First operand 7684 states and 26154 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:02,682 INFO L93 Difference]: Finished difference Result 9322 states and 31376 transitions. [2021-07-09 18:31:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:31:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:31:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:02,700 INFO L225 Difference]: With dead ends: 9322 [2021-07-09 18:31:02,700 INFO L226 Difference]: Without dead ends: 9307 [2021-07-09 18:31:02,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1561.9ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:31:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-07-09 18:31:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7687. [2021-07-09 18:31:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7687 states, 7686 states have (on average 3.4043715846994536) internal successors, (26166), 7686 states have internal predecessors, (26166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7687 states to 7687 states and 26166 transitions. [2021-07-09 18:31:02,820 INFO L78 Accepts]: Start accepts. Automaton has 7687 states and 26166 transitions. Word has length 30 [2021-07-09 18:31:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:02,820 INFO L482 AbstractCegarLoop]: Abstraction has 7687 states and 26166 transitions. [2021-07-09 18:31:02,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7687 states and 26166 transitions. [2021-07-09 18:31:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:02,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:02,832 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:03,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:03,032 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash -491829020, now seen corresponding path program 142 times [2021-07-09 18:31:03,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:03,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088637136] [2021-07-09 18:31:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:03,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088637136] [2021-07-09 18:31:03,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088637136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192847059] [2021-07-09 18:31:03,721 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 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 [2021-07-09 18:31:03,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:03,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:04,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:31:04,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:04,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:04,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:04,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:31:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192847059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:04,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:04,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:31:04,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609445401] [2021-07-09 18:31:04,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:31:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:31:04,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:31:04,269 INFO L87 Difference]: Start difference. First operand 7687 states and 26166 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:31:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:07,156 INFO L93 Difference]: Finished difference Result 10068 states and 33705 transitions. [2021-07-09 18:31:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:31:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 30 [2021-07-09 18:31:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:07,176 INFO L225 Difference]: With dead ends: 10068 [2021-07-09 18:31:07,177 INFO L226 Difference]: Without dead ends: 10022 [2021-07-09 18:31:07,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2114.9ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:31:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-07-09 18:31:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 7692. [2021-07-09 18:31:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 7691 states have (on average 3.4039786763749835) internal successors, (26180), 7691 states have internal predecessors, (26180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 26180 transitions. [2021-07-09 18:31:07,314 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 26180 transitions. Word has length 30 [2021-07-09 18:31:07,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:07,314 INFO L482 AbstractCegarLoop]: Abstraction has 7692 states and 26180 transitions. [2021-07-09 18:31:07,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-07-09 18:31:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 26180 transitions. [2021-07-09 18:31:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:07,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:07,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:07,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-07-09 18:31:07,526 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:07,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:07,527 INFO L82 PathProgramCache]: Analyzing trace with hash -245264536, now seen corresponding path program 143 times [2021-07-09 18:31:07,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:07,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746070978] [2021-07-09 18:31:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:08,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:08,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746070978] [2021-07-09 18:31:08,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746070978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:08,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859689959] [2021-07-09 18:31:08,050 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 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 [2021-07-09 18:31:08,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:31:08,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:08,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:31:08,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:08,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:08,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:08,578 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 29 treesize of output 25 [2021-07-09 18:31:08,580 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:08,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:08,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:08,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:31:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:08,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859689959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:08,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:08,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-07-09 18:31:08,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821020573] [2021-07-09 18:31:08,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:31:08,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:08,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:31:08,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:31:08,751 INFO L87 Difference]: Start difference. First operand 7692 states and 26180 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2021-07-09 18:31:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:10,534 INFO L93 Difference]: Finished difference Result 10182 states and 34192 transitions. [2021-07-09 18:31:10,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:31:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 30 [2021-07-09 18:31:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:10,556 INFO L225 Difference]: With dead ends: 10182 [2021-07-09 18:31:10,556 INFO L226 Difference]: Without dead ends: 10135 [2021-07-09 18:31:10,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1458.6ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:31:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-07-09 18:31:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 7690. [2021-07-09 18:31:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7690 states, 7689 states have (on average 3.403953700091039) internal successors, (26173), 7689 states have internal predecessors, (26173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7690 states to 7690 states and 26173 transitions. [2021-07-09 18:31:10,718 INFO L78 Accepts]: Start accepts. Automaton has 7690 states and 26173 transitions. Word has length 30 [2021-07-09 18:31:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:10,718 INFO L482 AbstractCegarLoop]: Abstraction has 7690 states and 26173 transitions. [2021-07-09 18:31:10,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2021-07-09 18:31:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7690 states and 26173 transitions. [2021-07-09 18:31:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:10,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:10,729 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:10,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-07-09 18:31:10,930 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1319108140, now seen corresponding path program 144 times [2021-07-09 18:31:10,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:10,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734037105] [2021-07-09 18:31:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734037105] [2021-07-09 18:31:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734037105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237626669] [2021-07-09 18:31:11,426 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 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 [2021-07-09 18:31:11,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:31:11,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:11,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:31:11,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:11,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,808 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 23 treesize of output 23 [2021-07-09 18:31:11,810 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:11,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:11,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:11,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:31:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:11,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237626669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:11,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:11,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:31:11,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439086950] [2021-07-09 18:31:11,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:31:11,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:11,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:31:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:31:11,975 INFO L87 Difference]: Start difference. First operand 7690 states and 26173 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:31:15,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:15,204 INFO L93 Difference]: Finished difference Result 9796 states and 32963 transitions. [2021-07-09 18:31:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:31:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-07-09 18:31:15,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:15,225 INFO L225 Difference]: With dead ends: 9796 [2021-07-09 18:31:15,225 INFO L226 Difference]: Without dead ends: 9761 [2021-07-09 18:31:15,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2455.8ms TimeCoverageRelationStatistics Valid=304, Invalid=1766, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:31:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9761 states. [2021-07-09 18:31:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9761 to 7708. [2021-07-09 18:31:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.40352925911509) internal successors, (26231), 7707 states have internal predecessors, (26231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 26231 transitions. [2021-07-09 18:31:15,357 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 26231 transitions. Word has length 30 [2021-07-09 18:31:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:15,357 INFO L482 AbstractCegarLoop]: Abstraction has 7708 states and 26231 transitions. [2021-07-09 18:31:15,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:31:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 26231 transitions. [2021-07-09 18:31:15,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:15,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:15,368 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:15,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:15,569 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash -331160296, now seen corresponding path program 145 times [2021-07-09 18:31:15,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:15,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488326711] [2021-07-09 18:31:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:16,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:16,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488326711] [2021-07-09 18:31:16,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488326711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:16,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339415102] [2021-07-09 18:31:16,056 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 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 [2021-07-09 18:31:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:16,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:16,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:16,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:16,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:16,526 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 19 treesize of output 19 [2021-07-09 18:31:16,527 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:16,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:16,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:16,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:28 [2021-07-09 18:31:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:16,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339415102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:16,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:16,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:31:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69111794] [2021-07-09 18:31:16,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:31:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:16,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:31:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:31:16,733 INFO L87 Difference]: Start difference. First operand 7708 states and 26231 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:31:17,723 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-09 18:31:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:19,186 INFO L93 Difference]: Finished difference Result 9863 states and 33168 transitions. [2021-07-09 18:31:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:31:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-07-09 18:31:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:19,208 INFO L225 Difference]: With dead ends: 9863 [2021-07-09 18:31:19,208 INFO L226 Difference]: Without dead ends: 9828 [2021-07-09 18:31:19,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1750.2ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:31:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2021-07-09 18:31:19,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 7722. [2021-07-09 18:31:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7722 states, 7721 states have (on average 3.4030565988861547) internal successors, (26275), 7721 states have internal predecessors, (26275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7722 states to 7722 states and 26275 transitions. [2021-07-09 18:31:19,369 INFO L78 Accepts]: Start accepts. Automaton has 7722 states and 26275 transitions. Word has length 30 [2021-07-09 18:31:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:19,369 INFO L482 AbstractCegarLoop]: Abstraction has 7722 states and 26275 transitions. [2021-07-09 18:31:19,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:31:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7722 states and 26275 transitions. [2021-07-09 18:31:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:19,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:19,381 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:19,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-07-09 18:31:19,582 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash -276295984, now seen corresponding path program 146 times [2021-07-09 18:31:19,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:19,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194963231] [2021-07-09 18:31:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194963231] [2021-07-09 18:31:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194963231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89232371] [2021-07-09 18:31:20,216 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 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 [2021-07-09 18:31:20,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:20,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:31:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:20,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:31:20,707 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:31:20,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:20,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:20,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:31:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:20,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89232371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:20,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:20,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:31:20,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259809625] [2021-07-09 18:31:20,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:31:20,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:20,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:31:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:31:20,910 INFO L87 Difference]: Start difference. First operand 7722 states and 26275 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:31:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:24,543 INFO L93 Difference]: Finished difference Result 10221 states and 34332 transitions. [2021-07-09 18:31:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:31:24,543 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 30 [2021-07-09 18:31:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:24,564 INFO L225 Difference]: With dead ends: 10221 [2021-07-09 18:31:24,564 INFO L226 Difference]: Without dead ends: 10142 [2021-07-09 18:31:24,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2624.9ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:31:24,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-07-09 18:31:24,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7745. [2021-07-09 18:31:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7745 states, 7744 states have (on average 3.4021177685950414) internal successors, (26346), 7744 states have internal predecessors, (26346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7745 states to 7745 states and 26346 transitions. [2021-07-09 18:31:24,700 INFO L78 Accepts]: Start accepts. Automaton has 7745 states and 26346 transitions. Word has length 30 [2021-07-09 18:31:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:24,700 INFO L482 AbstractCegarLoop]: Abstraction has 7745 states and 26346 transitions. [2021-07-09 18:31:24,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:31:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7745 states and 26346 transitions. [2021-07-09 18:31:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:24,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:24,712 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:24,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:24,912 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash -781961368, now seen corresponding path program 147 times [2021-07-09 18:31:24,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:24,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597119357] [2021-07-09 18:31:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:25,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:25,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597119357] [2021-07-09 18:31:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597119357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:25,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320043583] [2021-07-09 18:31:25,574 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 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 [2021-07-09 18:31:25,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:31:25,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:31:25,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:26,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2021-07-09 18:31:26,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:31:26,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:26,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:26,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:282 [2021-07-09 18:31:26,640 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-09 18:31:27,178 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-07-09 18:31:27,479 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-09 18:31:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:27,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320043583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:27,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:27,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:31:27,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637881393] [2021-07-09 18:31:27,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:31:27,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:27,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:31:27,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:31:27,527 INFO L87 Difference]: Start difference. First operand 7745 states and 26346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:28,366 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-07-09 18:31:29,122 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2021-07-09 18:31:29,901 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 22 [2021-07-09 18:31:30,422 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 25 [2021-07-09 18:31:30,689 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 26 [2021-07-09 18:31:30,983 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2021-07-09 18:31:31,853 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-07-09 18:31:32,048 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-07-09 18:31:32,305 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2021-07-09 18:31:32,519 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2021-07-09 18:31:32,864 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-07-09 18:31:33,348 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 23 [2021-07-09 18:31:33,794 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2021-07-09 18:31:34,734 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-09 18:31:35,000 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-07-09 18:31:35,749 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-07-09 18:31:36,130 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-07-09 18:31:36,560 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-07-09 18:31:37,113 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-09 18:31:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:37,627 INFO L93 Difference]: Finished difference Result 11812 states and 39325 transitions. [2021-07-09 18:31:37,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:31:37,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:31:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:37,651 INFO L225 Difference]: With dead ends: 11812 [2021-07-09 18:31:37,651 INFO L226 Difference]: Without dead ends: 11727 [2021-07-09 18:31:37,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 8851.5ms TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:31:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11727 states. [2021-07-09 18:31:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11727 to 7810. [2021-07-09 18:31:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7810 states, 7809 states have (on average 3.4061979766935586) internal successors, (26599), 7809 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7810 states to 7810 states and 26599 transitions. [2021-07-09 18:31:37,801 INFO L78 Accepts]: Start accepts. Automaton has 7810 states and 26599 transitions. Word has length 30 [2021-07-09 18:31:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:37,801 INFO L482 AbstractCegarLoop]: Abstraction has 7810 states and 26599 transitions. [2021-07-09 18:31:37,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7810 states and 26599 transitions. [2021-07-09 18:31:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:37,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:37,813 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:38,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:38,013 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash 788028937, now seen corresponding path program 50 times [2021-07-09 18:31:38,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:38,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103231376] [2021-07-09 18:31:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:38,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:38,237 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-07-09 18:31:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:38,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:38,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103231376] [2021-07-09 18:31:38,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103231376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:38,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016308812] [2021-07-09 18:31:38,937 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 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 [2021-07-09 18:31:38,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:31:38,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:31:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:39,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:39,396 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-07-09 18:31:39,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:39,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:39,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:39,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-07-09 18:31:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:39,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016308812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:39,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:39,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-09 18:31:39,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971582949] [2021-07-09 18:31:39,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:31:39,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:39,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:31:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:31:39,454 INFO L87 Difference]: Start difference. First operand 7810 states and 26599 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-07-09 18:31:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:41,704 INFO L93 Difference]: Finished difference Result 9430 states and 31554 transitions. [2021-07-09 18:31:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:31:41,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 30 [2021-07-09 18:31:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:41,724 INFO L225 Difference]: With dead ends: 9430 [2021-07-09 18:31:41,724 INFO L226 Difference]: Without dead ends: 9404 [2021-07-09 18:31:41,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2238.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:31:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9404 states. [2021-07-09 18:31:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9404 to 7836. [2021-07-09 18:31:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-07-09 18:31:41,864 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-07-09 18:31:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:41,864 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-07-09 18:31:41,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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) [2021-07-09 18:31:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-07-09 18:31:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:41,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:41,876 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:42,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-09 18:31:42,077 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 50056363, now seen corresponding path program 51 times [2021-07-09 18:31:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:42,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110084174] [2021-07-09 18:31:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:42,294 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-07-09 18:31:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:43,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:43,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110084174] [2021-07-09 18:31:43,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110084174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:43,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477048643] [2021-07-09 18:31:43,011 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 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 [2021-07-09 18:31:43,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:31:43,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:43,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:31:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:43,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:43,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:43,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:43,709 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 21 treesize of output 11 [2021-07-09 18:31:43,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:43,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:43,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:43,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:31:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:43,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477048643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:43,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:43,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:31:43,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062308168] [2021-07-09 18:31:43,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:31:43,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:31:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:31:43,759 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:44,991 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-07-09 18:31:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:48,124 INFO L93 Difference]: Finished difference Result 9653 states and 32165 transitions. [2021-07-09 18:31:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:31:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:31:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:48,144 INFO L225 Difference]: With dead ends: 9653 [2021-07-09 18:31:48,145 INFO L226 Difference]: Without dead ends: 9638 [2021-07-09 18:31:48,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3607.1ms TimeCoverageRelationStatistics Valid=317, Invalid=2335, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:31:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9638 states. [2021-07-09 18:31:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9638 to 7836. [2021-07-09 18:31:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7836 states, 7835 states have (on average 3.4031908104658584) internal successors, (26664), 7835 states have internal predecessors, (26664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7836 states to 7836 states and 26664 transitions. [2021-07-09 18:31:48,284 INFO L78 Accepts]: Start accepts. Automaton has 7836 states and 26664 transitions. Word has length 30 [2021-07-09 18:31:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:48,284 INFO L482 AbstractCegarLoop]: Abstraction has 7836 states and 26664 transitions. [2021-07-09 18:31:48,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 7836 states and 26664 transitions. [2021-07-09 18:31:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:48,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:48,298 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:48,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:48,501 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1431852029, now seen corresponding path program 52 times [2021-07-09 18:31:48,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:48,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934102978] [2021-07-09 18:31:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:48,718 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-07-09 18:31:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:49,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934102978] [2021-07-09 18:31:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934102978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863367977] [2021-07-09 18:31:49,444 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 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 [2021-07-09 18:31:49,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:31:49,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:31:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:49,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:49,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:49,868 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 [2021-07-09 18:31:49,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:49,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:49,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:49,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-07-09 18:31:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:49,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863367977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:49,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:49,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-09 18:31:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892249069] [2021-07-09 18:31:49,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:31:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:31:49,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:31:49,927 INFO L87 Difference]: Start difference. First operand 7836 states and 26664 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:51,097 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-07-09 18:31:51,488 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-07-09 18:31:52,463 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 18:31:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:52,680 INFO L93 Difference]: Finished difference Result 9381 states and 31423 transitions. [2021-07-09 18:31:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:31:52,680 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:31:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:52,699 INFO L225 Difference]: With dead ends: 9381 [2021-07-09 18:31:52,699 INFO L226 Difference]: Without dead ends: 9355 [2021-07-09 18:31:52,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3144.1ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:31:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9355 states. [2021-07-09 18:31:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9355 to 7848. [2021-07-09 18:31:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-07-09 18:31:52,823 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-07-09 18:31:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:52,823 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-07-09 18:31:52,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-07-09 18:31:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:52,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:52,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:53,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:31:53,043 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1082463897, now seen corresponding path program 53 times [2021-07-09 18:31:53,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:53,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926704318] [2021-07-09 18:31:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:53,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926704318] [2021-07-09 18:31:53,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926704318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098118724] [2021-07-09 18:31:53,958 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 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 [2021-07-09 18:31:53,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:31:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:53,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:31:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:54,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:54,392 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 [2021-07-09 18:31:54,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:54,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:54,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-07-09 18:31:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:54,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098118724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:54,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:54,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2021-07-09 18:31:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803553236] [2021-07-09 18:31:54,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:31:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:31:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:31:54,445 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:31:56,397 INFO L93 Difference]: Finished difference Result 9369 states and 31402 transitions. [2021-07-09 18:31:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:31:56,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:31:56,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:31:56,416 INFO L225 Difference]: With dead ends: 9369 [2021-07-09 18:31:56,416 INFO L226 Difference]: Without dead ends: 9354 [2021-07-09 18:31:56,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2255.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:31:56,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9354 states. [2021-07-09 18:31:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9354 to 7848. [2021-07-09 18:31:56,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.401809608767682) internal successors, (26694), 7847 states have internal predecessors, (26694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 26694 transitions. [2021-07-09 18:31:56,542 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 26694 transitions. Word has length 30 [2021-07-09 18:31:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:31:56,542 INFO L482 AbstractCegarLoop]: Abstraction has 7848 states and 26694 transitions. [2021-07-09 18:31:56,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 26694 transitions. [2021-07-09 18:31:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:31:56,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:31:56,553 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:31:56,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-07-09 18:31:56,761 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:31:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:31:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash 704274543, now seen corresponding path program 54 times [2021-07-09 18:31:56,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:31:56,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027528475] [2021-07-09 18:31:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:31:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:31:57,009 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-07-09 18:31:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:57,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:31:57,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027528475] [2021-07-09 18:31:57,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027528475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:57,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5543225] [2021-07-09 18:31:57,471 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 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 [2021-07-09 18:31:57,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:31:57,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:31:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:31:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:31:57,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:31:57,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:57,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:31:57,987 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 21 treesize of output 11 [2021-07-09 18:31:57,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:31:58,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:31:58,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:31:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:31:58,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5543225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:31:58,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:31:58,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-09 18:31:58,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436724404] [2021-07-09 18:31:58,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:31:58,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:31:58,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:31:58,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:31:58,036 INFO L87 Difference]: Start difference. First operand 7848 states and 26694 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:31:59,261 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-07-09 18:32:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:01,141 INFO L93 Difference]: Finished difference Result 9087 states and 30043 transitions. [2021-07-09 18:32:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:32:01,141 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:32:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:01,159 INFO L225 Difference]: With dead ends: 9087 [2021-07-09 18:32:01,159 INFO L226 Difference]: Without dead ends: 9057 [2021-07-09 18:32:01,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2964.4ms TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:32:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-07-09 18:32:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7888. [2021-07-09 18:32:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 3.398250285279574) internal successors, (26802), 7887 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 26802 transitions. [2021-07-09 18:32:01,290 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 26802 transitions. Word has length 30 [2021-07-09 18:32:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:01,290 INFO L482 AbstractCegarLoop]: Abstraction has 7888 states and 26802 transitions. [2021-07-09 18:32:01,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 26802 transitions. [2021-07-09 18:32:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:01,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:01,302 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:01,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:01,503 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:01,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:01,503 INFO L82 PathProgramCache]: Analyzing trace with hash 742037125, now seen corresponding path program 55 times [2021-07-09 18:32:01,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:01,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110874405] [2021-07-09 18:32:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:01,747 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-07-09 18:32:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:02,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:02,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110874405] [2021-07-09 18:32:02,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110874405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:02,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719843925] [2021-07-09 18:32:02,392 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 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 [2021-07-09 18:32:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:02,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:32:02,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:02,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:02,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:02,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:02,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:02,814 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 21 treesize of output 11 [2021-07-09 18:32:02,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:02,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:02,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:02,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:32:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:02,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719843925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:02,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:02,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:32:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082541242] [2021-07-09 18:32:02,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:32:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:32:02,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:32:02,867 INFO L87 Difference]: Start difference. First operand 7888 states and 26802 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-07-09 18:32:06,575 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-07-09 18:32:07,208 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-07-09 18:32:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:07,495 INFO L93 Difference]: Finished difference Result 9802 states and 32822 transitions. [2021-07-09 18:32:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:32:07,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 30 [2021-07-09 18:32:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:07,548 INFO L225 Difference]: With dead ends: 9802 [2021-07-09 18:32:07,548 INFO L226 Difference]: Without dead ends: 9740 [2021-07-09 18:32:07,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 3859.1ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:32:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9740 states. [2021-07-09 18:32:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9740 to 7900. [2021-07-09 18:32:07,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 3.396885681731865) internal successors, (26832), 7899 states have internal predecessors, (26832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 26832 transitions. [2021-07-09 18:32:07,675 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 26832 transitions. Word has length 30 [2021-07-09 18:32:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:07,676 INFO L482 AbstractCegarLoop]: Abstraction has 7900 states and 26832 transitions. [2021-07-09 18:32:07,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-07-09 18:32:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 26832 transitions. [2021-07-09 18:32:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:07,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:07,687 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:07,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:07,887 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1402383373, now seen corresponding path program 56 times [2021-07-09 18:32:07,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:07,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391201745] [2021-07-09 18:32:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:08,111 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-07-09 18:32:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:08,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:08,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391201745] [2021-07-09 18:32:08,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391201745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:08,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721470920] [2021-07-09 18:32:08,579 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 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 [2021-07-09 18:32:08,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:08,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:08,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:32:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:09,086 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-07-09 18:32:09,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:09,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:09,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:09,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-09 18:32:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:09,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721470920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:09,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:09,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:32:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363641425] [2021-07-09 18:32:09,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:32:09,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:09,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:32:09,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:32:09,142 INFO L87 Difference]: Start difference. First operand 7900 states and 26832 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-07-09 18:32:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:12,784 INFO L93 Difference]: Finished difference Result 9832 states and 32876 transitions. [2021-07-09 18:32:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:32:12,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 30 [2021-07-09 18:32:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:12,803 INFO L225 Difference]: With dead ends: 9832 [2021-07-09 18:32:12,803 INFO L226 Difference]: Without dead ends: 9778 [2021-07-09 18:32:12,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2837.7ms TimeCoverageRelationStatistics Valid=404, Invalid=2046, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:32:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-07-09 18:32:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 7906. [2021-07-09 18:32:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7906 states, 7905 states have (on average 3.3964579380139153) internal successors, (26849), 7905 states have internal predecessors, (26849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 26849 transitions. [2021-07-09 18:32:12,931 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 26849 transitions. Word has length 30 [2021-07-09 18:32:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:12,931 INFO L482 AbstractCegarLoop]: Abstraction has 7906 states and 26849 transitions. [2021-07-09 18:32:12,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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) [2021-07-09 18:32:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 26849 transitions. [2021-07-09 18:32:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:12,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:12,943 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:13,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:13,144 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:13,145 INFO L82 PathProgramCache]: Analyzing trace with hash -754295013, now seen corresponding path program 57 times [2021-07-09 18:32:13,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:13,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812051990] [2021-07-09 18:32:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:13,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:13,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812051990] [2021-07-09 18:32:13,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812051990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:13,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106086467] [2021-07-09 18:32:13,984 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 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 [2021-07-09 18:32:14,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:32:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 18:32:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:14,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:14,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:14,563 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 21 treesize of output 11 [2021-07-09 18:32:14,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:14,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:14,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:14,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:13 [2021-07-09 18:32:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:14,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106086467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:14,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:14,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-09 18:32:14,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316123680] [2021-07-09 18:32:14,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:32:14,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:32:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:32:14,729 INFO L87 Difference]: Start difference. First operand 7906 states and 26849 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:15,884 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-07-09 18:32:18,123 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-07-09 18:32:20,283 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-07-09 18:32:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:20,880 INFO L93 Difference]: Finished difference Result 9776 states and 32529 transitions. [2021-07-09 18:32:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:32:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:32:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:20,901 INFO L225 Difference]: With dead ends: 9776 [2021-07-09 18:32:20,901 INFO L226 Difference]: Without dead ends: 9693 [2021-07-09 18:32:20,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 4500.1ms TimeCoverageRelationStatistics Valid=484, Invalid=3806, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:32:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9693 states. [2021-07-09 18:32:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9693 to 7982. [2021-07-09 18:32:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7982 states, 7981 states have (on average 3.3914296454078436) internal successors, (27067), 7981 states have internal predecessors, (27067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7982 states to 7982 states and 27067 transitions. [2021-07-09 18:32:21,033 INFO L78 Accepts]: Start accepts. Automaton has 7982 states and 27067 transitions. Word has length 30 [2021-07-09 18:32:21,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:21,033 INFO L482 AbstractCegarLoop]: Abstraction has 7982 states and 27067 transitions. [2021-07-09 18:32:21,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:21,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7982 states and 27067 transitions. [2021-07-09 18:32:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:21,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:21,045 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:21,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-09 18:32:21,245 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash -716532431, now seen corresponding path program 58 times [2021-07-09 18:32:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:21,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462897132] [2021-07-09 18:32:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:21,453 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-09 18:32:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:22,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462897132] [2021-07-09 18:32:22,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462897132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:22,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818451838] [2021-07-09 18:32:22,047 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 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 [2021-07-09 18:32:22,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:32:22,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:22,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:22,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:22,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:22,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:22,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-07-09 18:32:22,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:22,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:22,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:22,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-07-09 18:32:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:22,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818451838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:22,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:22,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2021-07-09 18:32:22,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165155264] [2021-07-09 18:32:22,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:32:22,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:22,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:32:22,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:32:22,567 INFO L87 Difference]: Start difference. First operand 7982 states and 27067 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2021-07-09 18:32:25,321 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-07-09 18:32:25,553 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-07-09 18:32:25,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:25,996 INFO L93 Difference]: Finished difference Result 9883 states and 33050 transitions. [2021-07-09 18:32:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:32:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 30 [2021-07-09 18:32:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:26,016 INFO L225 Difference]: With dead ends: 9883 [2021-07-09 18:32:26,016 INFO L226 Difference]: Without dead ends: 9857 [2021-07-09 18:32:26,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3127.1ms TimeCoverageRelationStatistics Valid=420, Invalid=1932, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:32:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9857 states. [2021-07-09 18:32:26,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9857 to 7986. [2021-07-09 18:32:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-07-09 18:32:26,147 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-07-09 18:32:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:26,147 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-07-09 18:32:26,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2021-07-09 18:32:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-07-09 18:32:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:26,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:26,160 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:26,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:26,361 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:26,361 INFO L82 PathProgramCache]: Analyzing trace with hash -953383713, now seen corresponding path program 59 times [2021-07-09 18:32:26,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:26,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994142421] [2021-07-09 18:32:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:27,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994142421] [2021-07-09 18:32:27,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994142421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197838268] [2021-07-09 18:32:27,235 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 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 [2021-07-09 18:32:27,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:27,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:27,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:27,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:27,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:27,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:27,705 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 [2021-07-09 18:32:27,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:27,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:27,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:27,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:7 [2021-07-09 18:32:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197838268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:27,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:27,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-07-09 18:32:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79486886] [2021-07-09 18:32:27,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:32:27,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:32:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:32:27,754 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:29,726 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-07-09 18:32:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:30,141 INFO L93 Difference]: Finished difference Result 9410 states and 31546 transitions. [2021-07-09 18:32:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:32:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:32:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:30,160 INFO L225 Difference]: With dead ends: 9410 [2021-07-09 18:32:30,160 INFO L226 Difference]: Without dead ends: 9384 [2021-07-09 18:32:30,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2563.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1353, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:32:30,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-07-09 18:32:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 7986. [2021-07-09 18:32:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.3909830932999374) internal successors, (27077), 7985 states have internal predecessors, (27077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27077 transitions. [2021-07-09 18:32:30,286 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27077 transitions. Word has length 30 [2021-07-09 18:32:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:30,286 INFO L482 AbstractCegarLoop]: Abstraction has 7986 states and 27077 transitions. [2021-07-09 18:32:30,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27077 transitions. [2021-07-09 18:32:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:30,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:30,300 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:30,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-07-09 18:32:30,500 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:30,501 INFO L82 PathProgramCache]: Analyzing trace with hash -664551470, now seen corresponding path program 148 times [2021-07-09 18:32:30,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:30,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990718299] [2021-07-09 18:32:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:30,889 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-07-09 18:32:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:31,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990718299] [2021-07-09 18:32:31,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990718299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:31,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999496286] [2021-07-09 18:32:31,335 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 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 [2021-07-09 18:32:31,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:32:31,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:31,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:31,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,804 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 19 treesize of output 19 [2021-07-09 18:32:31,805 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:31,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:31,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:31,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:32:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:31,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999496286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:31,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:31,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:32:31,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424447752] [2021-07-09 18:32:31,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:32:31,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:31,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:32:31,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:32:31,924 INFO L87 Difference]: Start difference. First operand 7986 states and 27077 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-07-09 18:32:32,801 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-07-09 18:32:33,116 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-09 18:32:33,322 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-07-09 18:32:33,619 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-07-09 18:32:33,805 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-07-09 18:32:34,772 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-07-09 18:32:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:35,531 INFO L93 Difference]: Finished difference Result 10995 states and 36694 transitions. [2021-07-09 18:32:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:32:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 30 [2021-07-09 18:32:35,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:35,554 INFO L225 Difference]: With dead ends: 10995 [2021-07-09 18:32:35,554 INFO L226 Difference]: Without dead ends: 10970 [2021-07-09 18:32:35,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 3046.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:32:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-07-09 18:32:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 8000. [2021-07-09 18:32:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8000 states, 7999 states have (on average 3.3905488186023254) internal successors, (27121), 7999 states have internal predecessors, (27121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8000 states to 8000 states and 27121 transitions. [2021-07-09 18:32:35,717 INFO L78 Accepts]: Start accepts. Automaton has 8000 states and 27121 transitions. Word has length 30 [2021-07-09 18:32:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:35,717 INFO L482 AbstractCegarLoop]: Abstraction has 8000 states and 27121 transitions. [2021-07-09 18:32:35,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2021-07-09 18:32:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8000 states and 27121 transitions. [2021-07-09 18:32:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:35,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:35,729 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:35,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-07-09 18:32:35,930 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:35,930 INFO L82 PathProgramCache]: Analyzing trace with hash 853941454, now seen corresponding path program 149 times [2021-07-09 18:32:35,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:35,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805124737] [2021-07-09 18:32:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:36,291 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:32:36,413 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-09 18:32:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:36,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805124737] [2021-07-09 18:32:36,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805124737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:36,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308642655] [2021-07-09 18:32:36,908 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 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 [2021-07-09 18:32:36,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:32:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:37,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:37,241 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 28 treesize of output 24 [2021-07-09 18:32:37,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:32:37,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:37,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:37,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:31 [2021-07-09 18:32:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:37,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308642655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:37,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:37,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-07-09 18:32:37,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112621030] [2021-07-09 18:32:37,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:32:37,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:37,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:32:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:32:37,489 INFO L87 Difference]: Start difference. First operand 8000 states and 27121 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2021-07-09 18:32:38,268 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-07-09 18:32:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:40,618 INFO L93 Difference]: Finished difference Result 10084 states and 33776 transitions. [2021-07-09 18:32:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:32:40,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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 30 [2021-07-09 18:32:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:40,639 INFO L225 Difference]: With dead ends: 10084 [2021-07-09 18:32:40,639 INFO L226 Difference]: Without dead ends: 10059 [2021-07-09 18:32:40,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2564.2ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:32:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10059 states. [2021-07-09 18:32:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10059 to 7998. [2021-07-09 18:32:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 7997 states have (on average 3.3905214455420785) internal successors, (27114), 7997 states have internal predecessors, (27114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 27114 transitions. [2021-07-09 18:32:40,809 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 27114 transitions. Word has length 30 [2021-07-09 18:32:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:40,809 INFO L482 AbstractCegarLoop]: Abstraction has 7998 states and 27114 transitions. [2021-07-09 18:32:40,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 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) [2021-07-09 18:32:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 27114 transitions. [2021-07-09 18:32:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:40,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:40,822 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:41,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:41,037 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 251753802, now seen corresponding path program 150 times [2021-07-09 18:32:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:41,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375556140] [2021-07-09 18:32:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:41,374 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:32:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:41,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375556140] [2021-07-09 18:32:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375556140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:41,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237646028] [2021-07-09 18:32:41,818 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 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 [2021-07-09 18:32:41,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:32:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:41,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:32:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:42,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:42,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:42,224 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 19 treesize of output 19 [2021-07-09 18:32:42,225 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:42,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:42,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:42,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:32:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:42,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237646028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:42,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:42,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:32:42,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791100055] [2021-07-09 18:32:42,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:32:42,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:32:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:32:42,359 INFO L87 Difference]: Start difference. First operand 7998 states and 27114 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-07-09 18:32:42,942 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-07-09 18:32:44,086 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-07-09 18:32:44,378 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-07-09 18:32:44,725 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-07-09 18:32:45,120 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-09 18:32:46,278 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-07-09 18:32:46,845 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-07-09 18:32:47,295 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-09 18:32:47,579 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-09 18:32:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:49,025 INFO L93 Difference]: Finished difference Result 10494 states and 35074 transitions. [2021-07-09 18:32:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:32:49,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 30 [2021-07-09 18:32:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:49,048 INFO L225 Difference]: With dead ends: 10494 [2021-07-09 18:32:49,048 INFO L226 Difference]: Without dead ends: 10459 [2021-07-09 18:32:49,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 4879.5ms TimeCoverageRelationStatistics Valid=388, Invalid=3152, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:32:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-07-09 18:32:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 7994. [2021-07-09 18:32:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7994 states, 7993 states have (on average 3.390716877267609) internal successors, (27102), 7993 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7994 states to 7994 states and 27102 transitions. [2021-07-09 18:32:49,203 INFO L78 Accepts]: Start accepts. Automaton has 7994 states and 27102 transitions. Word has length 30 [2021-07-09 18:32:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:49,203 INFO L482 AbstractCegarLoop]: Abstraction has 7994 states and 27102 transitions. [2021-07-09 18:32:49,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-07-09 18:32:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 7994 states and 27102 transitions. [2021-07-09 18:32:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:49,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:49,216 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:49,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-07-09 18:32:49,416 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:49,416 INFO L82 PathProgramCache]: Analyzing trace with hash 573674318, now seen corresponding path program 151 times [2021-07-09 18:32:49,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:49,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651292590] [2021-07-09 18:32:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:49,801 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-07-09 18:32:49,957 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-07-09 18:32:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:50,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:50,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651292590] [2021-07-09 18:32:50,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651292590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:50,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473690388] [2021-07-09 18:32:50,195 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 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 [2021-07-09 18:32:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:32:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:50,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:50,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:50,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:50,682 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 21 treesize of output 19 [2021-07-09 18:32:50,683 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:32:50,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:50,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:50,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-09 18:32:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:50,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473690388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:50,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:50,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:32:50,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838629835] [2021-07-09 18:32:50,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:32:50,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:50,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:32:50,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:32:50,900 INFO L87 Difference]: Start difference. First operand 7994 states and 27102 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:32:51,379 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-07-09 18:32:52,707 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:32:52,902 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-09 18:32:53,069 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-07-09 18:32:53,587 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-07-09 18:32:53,941 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-07-09 18:32:54,139 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-07-09 18:32:55,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:55,433 INFO L93 Difference]: Finished difference Result 10167 states and 33996 transitions. [2021-07-09 18:32:55,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:32:55,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:32:55,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:55,453 INFO L225 Difference]: With dead ends: 10167 [2021-07-09 18:32:55,454 INFO L226 Difference]: Without dead ends: 10142 [2021-07-09 18:32:55,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 3360.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:32:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10142 states. [2021-07-09 18:32:55,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10142 to 7984. [2021-07-09 18:32:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.3899536515094577) internal successors, (27062), 7983 states have internal predecessors, (27062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 27062 transitions. [2021-07-09 18:32:55,636 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 27062 transitions. Word has length 30 [2021-07-09 18:32:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 27062 transitions. [2021-07-09 18:32:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:32:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 27062 transitions. [2021-07-09 18:32:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:55,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:55,647 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:55,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-07-09 18:32:55,847 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1259503864, now seen corresponding path program 152 times [2021-07-09 18:32:55,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:55,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246645934] [2021-07-09 18:32:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:56,178 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-07-09 18:32:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:56,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:32:56,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246645934] [2021-07-09 18:32:56,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246645934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:56,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217047950] [2021-07-09 18:32:56,585 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 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 [2021-07-09 18:32:56,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:32:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:32:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:32:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:32:57,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:32:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:32:57,125 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 19 treesize of output 11 [2021-07-09 18:32:57,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:32:57,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:32:57,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-07-09 18:32:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:32:57,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217047950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:32:57,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:32:57,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:32:57,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261185761] [2021-07-09 18:32:57,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:32:57,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:32:57,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:32:57,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:32:57,176 INFO L87 Difference]: Start difference. First operand 7984 states and 27062 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:32:58,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:32:58,861 INFO L93 Difference]: Finished difference Result 9731 states and 32614 transitions. [2021-07-09 18:32:58,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:32:58,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 30 [2021-07-09 18:32:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:32:58,881 INFO L225 Difference]: With dead ends: 9731 [2021-07-09 18:32:58,881 INFO L226 Difference]: Without dead ends: 9710 [2021-07-09 18:32:58,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1645.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:32:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9710 states. [2021-07-09 18:32:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9710 to 7980. [2021-07-09 18:32:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 3.3896478255420477) internal successors, (27046), 7979 states have internal predecessors, (27046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:32:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 27046 transitions. [2021-07-09 18:32:59,005 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 27046 transitions. Word has length 30 [2021-07-09 18:32:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:32:59,005 INFO L482 AbstractCegarLoop]: Abstraction has 7980 states and 27046 transitions. [2021-07-09 18:32:59,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2021-07-09 18:32:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 27046 transitions. [2021-07-09 18:32:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:32:59,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:32:59,016 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:32:59,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:32:59,217 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:32:59,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:32:59,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1211576124, now seen corresponding path program 153 times [2021-07-09 18:32:59,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:32:59,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875136622] [2021-07-09 18:32:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:32:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:32:59,592 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-07-09 18:33:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:00,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:00,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875136622] [2021-07-09 18:33:00,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875136622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:00,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578535135] [2021-07-09 18:33:00,105 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 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 [2021-07-09 18:33:00,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:00,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:00,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:33:00,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:00,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:00,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:00,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2021-07-09 18:33:00,517 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:00,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:00,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:00,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:28 [2021-07-09 18:33:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578535135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:00,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:00,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:33:00,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870901125] [2021-07-09 18:33:00,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:00,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:00,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:00,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:00,700 INFO L87 Difference]: Start difference. First operand 7980 states and 27046 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:33:01,266 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-07-09 18:33:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:02,599 INFO L93 Difference]: Finished difference Result 9872 states and 33137 transitions. [2021-07-09 18:33:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:33:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:33:02,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:02,618 INFO L225 Difference]: With dead ends: 9872 [2021-07-09 18:33:02,618 INFO L226 Difference]: Without dead ends: 9847 [2021-07-09 18:33:02,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1915.7ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:33:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2021-07-09 18:33:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 7958. [2021-07-09 18:33:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7958 states, 7957 states have (on average 3.390222445645344) internal successors, (26976), 7957 states have internal predecessors, (26976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7958 states to 7958 states and 26976 transitions. [2021-07-09 18:33:02,745 INFO L78 Accepts]: Start accepts. Automaton has 7958 states and 26976 transitions. Word has length 30 [2021-07-09 18:33:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:02,745 INFO L482 AbstractCegarLoop]: Abstraction has 7958 states and 26976 transitions. [2021-07-09 18:33:02,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:33:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7958 states and 26976 transitions. [2021-07-09 18:33:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:02,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:02,756 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:02,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:02,956 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1891615694, now seen corresponding path program 154 times [2021-07-09 18:33:02,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:02,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655506426] [2021-07-09 18:33:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:03,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:03,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655506426] [2021-07-09 18:33:03,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655506426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:03,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238259504] [2021-07-09 18:33:03,551 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 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 [2021-07-09 18:33:03,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:03,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:04,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:04,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:04,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:33:04,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:04,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:04,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:33:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:04,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238259504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:04,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:04,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:33:04,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113320632] [2021-07-09 18:33:04,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:04,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:04,202 INFO L87 Difference]: Start difference. First operand 7958 states and 26976 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:33:04,521 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-09 18:33:05,044 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-07-09 18:33:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:06,572 INFO L93 Difference]: Finished difference Result 9882 states and 33193 transitions. [2021-07-09 18:33:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:33:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:33:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:06,591 INFO L225 Difference]: With dead ends: 9882 [2021-07-09 18:33:06,591 INFO L226 Difference]: Without dead ends: 9867 [2021-07-09 18:33:06,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1877.6ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:33:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2021-07-09 18:33:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 7963. [2021-07-09 18:33:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3904797789500125) internal successors, (26995), 7962 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26995 transitions. [2021-07-09 18:33:06,751 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26995 transitions. Word has length 30 [2021-07-09 18:33:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:06,751 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26995 transitions. [2021-07-09 18:33:06,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:33:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26995 transitions. [2021-07-09 18:33:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:06,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:06,763 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:06,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:06,963 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2145279528, now seen corresponding path program 155 times [2021-07-09 18:33:06,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:06,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109817174] [2021-07-09 18:33:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:07,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109817174] [2021-07-09 18:33:07,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109817174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:07,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278218215] [2021-07-09 18:33:07,559 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 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 [2021-07-09 18:33:07,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:33:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:08,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,101 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 19 treesize of output 19 [2021-07-09 18:33:08,102 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:08,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:08,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:08,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:33:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:08,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278218215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:08,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:08,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:33:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902089947] [2021-07-09 18:33:08,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:08,228 INFO L87 Difference]: Start difference. First operand 7963 states and 26995 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:33:08,566 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-07-09 18:33:09,107 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-09 18:33:09,783 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-07-09 18:33:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:11,404 INFO L93 Difference]: Finished difference Result 10270 states and 34453 transitions. [2021-07-09 18:33:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:33:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:33:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:11,423 INFO L225 Difference]: With dead ends: 10270 [2021-07-09 18:33:11,423 INFO L226 Difference]: Without dead ends: 10255 [2021-07-09 18:33:11,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2427.0ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:33:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10255 states. [2021-07-09 18:33:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10255 to 7960. [2021-07-09 18:33:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7960 states, 7959 states have (on average 3.390124387485865) internal successors, (26982), 7959 states have internal predecessors, (26982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 26982 transitions. [2021-07-09 18:33:11,555 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 26982 transitions. Word has length 30 [2021-07-09 18:33:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:11,556 INFO L482 AbstractCegarLoop]: Abstraction has 7960 states and 26982 transitions. [2021-07-09 18:33:11,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:33:11,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 26982 transitions. [2021-07-09 18:33:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:11,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:11,568 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:11,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-07-09 18:33:11,770 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash 544914058, now seen corresponding path program 156 times [2021-07-09 18:33:11,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:11,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2840440] [2021-07-09 18:33:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:12,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2840440] [2021-07-09 18:33:12,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2840440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044716446] [2021-07-09 18:33:12,381 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:12,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:33:12,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:33:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:12,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:12,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:12,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 19 treesize of output 11 [2021-07-09 18:33:12,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:12,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:12,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:12,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:33:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044716446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:13,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:13,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:33:13,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142890724] [2021-07-09 18:33:13,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:13,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:13,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:13,017 INFO L87 Difference]: Start difference. First operand 7960 states and 26982 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:33:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:14,422 INFO L93 Difference]: Finished difference Result 9564 states and 32107 transitions. [2021-07-09 18:33:14,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:33:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:33:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:14,474 INFO L225 Difference]: With dead ends: 9564 [2021-07-09 18:33:14,474 INFO L226 Difference]: Without dead ends: 9549 [2021-07-09 18:33:14,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1309.2ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:33:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-07-09 18:33:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7963. [2021-07-09 18:33:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3903541823662398) internal successors, (26994), 7962 states have internal predecessors, (26994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:14,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26994 transitions. [2021-07-09 18:33:14,585 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26994 transitions. Word has length 30 [2021-07-09 18:33:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:14,585 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26994 transitions. [2021-07-09 18:33:14,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:33:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26994 transitions. [2021-07-09 18:33:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:14,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:14,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:14,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable654,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:14,797 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1866014684, now seen corresponding path program 157 times [2021-07-09 18:33:14,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:14,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602617444] [2021-07-09 18:33:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:15,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:15,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602617444] [2021-07-09 18:33:15,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602617444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:15,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821113414] [2021-07-09 18:33:15,418 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:15,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:15,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:15,940 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 19 treesize of output 19 [2021-07-09 18:33:15,941 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:15,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:15,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:15,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:33:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:16,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821113414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:16,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:16,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:33:16,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501357276] [2021-07-09 18:33:16,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:16,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:16,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:16,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:16,062 INFO L87 Difference]: Start difference. First operand 7963 states and 26994 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:33:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:17,776 INFO L93 Difference]: Finished difference Result 10118 states and 33877 transitions. [2021-07-09 18:33:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:33:17,776 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 30 [2021-07-09 18:33:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:17,832 INFO L225 Difference]: With dead ends: 10118 [2021-07-09 18:33:17,832 INFO L226 Difference]: Without dead ends: 10099 [2021-07-09 18:33:17,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1542.4ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:33:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2021-07-09 18:33:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 7959. [2021-07-09 18:33:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 3.3901734104046244) internal successors, (26979), 7958 states have internal predecessors, (26979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 26979 transitions. [2021-07-09 18:33:17,960 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 26979 transitions. Word has length 30 [2021-07-09 18:33:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:17,960 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 26979 transitions. [2021-07-09 18:33:17,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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) [2021-07-09 18:33:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 26979 transitions. [2021-07-09 18:33:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:17,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:17,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:18,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-07-09 18:33:18,173 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1199797958, now seen corresponding path program 158 times [2021-07-09 18:33:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:18,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642301324] [2021-07-09 18:33:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:18,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:18,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642301324] [2021-07-09 18:33:18,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642301324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:18,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277945791] [2021-07-09 18:33:18,799 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:18,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:18,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:19,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:19,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:19,301 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 29 treesize of output 25 [2021-07-09 18:33:19,302 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:19,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:19,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:19,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:33:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:19,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277945791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:19,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:19,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:33:19,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529287828] [2021-07-09 18:33:19,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:33:19,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:19,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:33:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:33:19,488 INFO L87 Difference]: Start difference. First operand 7959 states and 26979 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:33:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:22,774 INFO L93 Difference]: Finished difference Result 10150 states and 33983 transitions. [2021-07-09 18:33:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:33:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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 30 [2021-07-09 18:33:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:22,795 INFO L225 Difference]: With dead ends: 10150 [2021-07-09 18:33:22,796 INFO L226 Difference]: Without dead ends: 10112 [2021-07-09 18:33:22,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1860.9ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:33:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2021-07-09 18:33:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 7955. [2021-07-09 18:33:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7955 states, 7954 states have (on average 3.3902439024390243) internal successors, (26966), 7954 states have internal predecessors, (26966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7955 states to 7955 states and 26966 transitions. [2021-07-09 18:33:22,928 INFO L78 Accepts]: Start accepts. Automaton has 7955 states and 26966 transitions. Word has length 30 [2021-07-09 18:33:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:22,928 INFO L482 AbstractCegarLoop]: Abstraction has 7955 states and 26966 transitions. [2021-07-09 18:33:22,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 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) [2021-07-09 18:33:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 7955 states and 26966 transitions. [2021-07-09 18:33:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:22,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:22,941 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:23,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:23,141 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:23,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1608720174, now seen corresponding path program 159 times [2021-07-09 18:33:23,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:23,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094109528] [2021-07-09 18:33:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:23,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:23,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094109528] [2021-07-09 18:33:23,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094109528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:23,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693047894] [2021-07-09 18:33:23,772 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:23,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:33:23,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:23,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:33:23,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:24,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:33:24,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-07-09 18:33:24,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:33:24,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:24,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:24,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-09 18:33:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:24,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693047894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:24,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:24,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:33:24,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290477428] [2021-07-09 18:33:24,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:24,500 INFO L87 Difference]: Start difference. First operand 7955 states and 26966 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:33:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:25,985 INFO L93 Difference]: Finished difference Result 9643 states and 32337 transitions. [2021-07-09 18:33:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:33:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) 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 30 [2021-07-09 18:33:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:26,004 INFO L225 Difference]: With dead ends: 9643 [2021-07-09 18:33:26,004 INFO L226 Difference]: Without dead ends: 9622 [2021-07-09 18:33:26,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1572.7ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:33:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2021-07-09 18:33:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 7963. [2021-07-09 18:33:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7963 states, 7962 states have (on average 3.3904797789500125) internal successors, (26995), 7962 states have internal predecessors, (26995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7963 states to 7963 states and 26995 transitions. [2021-07-09 18:33:26,130 INFO L78 Accepts]: Start accepts. Automaton has 7963 states and 26995 transitions. Word has length 30 [2021-07-09 18:33:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:26,130 INFO L482 AbstractCegarLoop]: Abstraction has 7963 states and 26995 transitions. [2021-07-09 18:33:26,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) 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) [2021-07-09 18:33:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 7963 states and 26995 transitions. [2021-07-09 18:33:26,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:26,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:26,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:26,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:26,341 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:26,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:26,342 INFO L82 PathProgramCache]: Analyzing trace with hash 164387662, now seen corresponding path program 160 times [2021-07-09 18:33:26,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:26,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144085629] [2021-07-09 18:33:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:26,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144085629] [2021-07-09 18:33:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144085629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100234138] [2021-07-09 18:33:26,930 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:26,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:33:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:27,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:27,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:27,464 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 19 treesize of output 19 [2021-07-09 18:33:27,466 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:27,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:27,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:27,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-09 18:33:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:27,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100234138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:27,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:27,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:33:27,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213485579] [2021-07-09 18:33:27,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:27,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:27,586 INFO L87 Difference]: Start difference. First operand 7963 states and 26995 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:33:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:29,409 INFO L93 Difference]: Finished difference Result 10548 states and 35223 transitions. [2021-07-09 18:33:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:33:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 30 [2021-07-09 18:33:29,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:29,430 INFO L225 Difference]: With dead ends: 10548 [2021-07-09 18:33:29,430 INFO L226 Difference]: Without dead ends: 10498 [2021-07-09 18:33:29,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1674.5ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:33:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10498 states. [2021-07-09 18:33:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10498 to 7965. [2021-07-09 18:33:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.3906328478151684) internal successors, (27003), 7964 states have internal predecessors, (27003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:29,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 27003 transitions. [2021-07-09 18:33:29,588 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 27003 transitions. Word has length 30 [2021-07-09 18:33:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:29,588 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 27003 transitions. [2021-07-09 18:33:29,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2021-07-09 18:33:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 27003 transitions. [2021-07-09 18:33:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:29,601 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:29,601 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:29,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:29,801 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1462747246, now seen corresponding path program 161 times [2021-07-09 18:33:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:29,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574831545] [2021-07-09 18:33:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574831545] [2021-07-09 18:33:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574831545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711190807] [2021-07-09 18:33:30,481 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:30,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:33:30,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:30,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:30,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:30,970 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 29 treesize of output 25 [2021-07-09 18:33:30,971 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:30,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:30,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:30,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:33:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:31,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711190807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:31,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:31,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-07-09 18:33:31,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753891923] [2021-07-09 18:33:31,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:33:31,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:31,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:33:31,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:33:31,162 INFO L87 Difference]: Start difference. First operand 7965 states and 27003 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-07-09 18:33:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:32,771 INFO L93 Difference]: Finished difference Result 10054 states and 33695 transitions. [2021-07-09 18:33:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:33:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 30 [2021-07-09 18:33:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:32,790 INFO L225 Difference]: With dead ends: 10054 [2021-07-09 18:33:32,790 INFO L226 Difference]: Without dead ends: 10030 [2021-07-09 18:33:32,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1482.4ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:33:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-07-09 18:33:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 7959. [2021-07-09 18:33:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 3.390424729831616) internal successors, (26981), 7958 states have internal predecessors, (26981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 26981 transitions. [2021-07-09 18:33:32,922 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 26981 transitions. Word has length 30 [2021-07-09 18:33:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:32,922 INFO L482 AbstractCegarLoop]: Abstraction has 7959 states and 26981 transitions. [2021-07-09 18:33:32,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2021-07-09 18:33:32,922 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 26981 transitions. [2021-07-09 18:33:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:32,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:32,934 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:33,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-09 18:33:33,134 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:33,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:33,134 INFO L82 PathProgramCache]: Analyzing trace with hash -135761518, now seen corresponding path program 162 times [2021-07-09 18:33:33,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:33,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079539407] [2021-07-09 18:33:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:33,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:33,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079539407] [2021-07-09 18:33:33,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079539407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:33,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832819549] [2021-07-09 18:33:33,860 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:33,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:33:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-09 18:33:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:34,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:34,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:34,352 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 19 treesize of output 19 [2021-07-09 18:33:34,354 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:34,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:34,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:34,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-09 18:33:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:34,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832819549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:34,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:34,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-07-09 18:33:34,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978986119] [2021-07-09 18:33:34,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:33:34,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:34,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:33:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:33:34,473 INFO L87 Difference]: Start difference. First operand 7959 states and 26981 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:33:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:38,903 INFO L93 Difference]: Finished difference Result 10875 states and 36072 transitions. [2021-07-09 18:33:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:33:38,904 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-07-09 18:33:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:38,926 INFO L225 Difference]: With dead ends: 10875 [2021-07-09 18:33:38,926 INFO L226 Difference]: Without dead ends: 10799 [2021-07-09 18:33:38,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2974.6ms TimeCoverageRelationStatistics Valid=339, Invalid=1823, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:33:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10799 states. [2021-07-09 18:33:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10799 to 7945. [2021-07-09 18:33:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7945 states, 7944 states have (on average 3.3908610271903323) internal successors, (26937), 7944 states have internal predecessors, (26937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7945 states to 7945 states and 26937 transitions. [2021-07-09 18:33:39,083 INFO L78 Accepts]: Start accepts. Automaton has 7945 states and 26937 transitions. Word has length 30 [2021-07-09 18:33:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:39,084 INFO L482 AbstractCegarLoop]: Abstraction has 7945 states and 26937 transitions. [2021-07-09 18:33:39,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-07-09 18:33:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 7945 states and 26937 transitions. [2021-07-09 18:33:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:39,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:39,095 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:39,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-07-09 18:33:39,296 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:39,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1439356142, now seen corresponding path program 163 times [2021-07-09 18:33:39,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:39,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971194535] [2021-07-09 18:33:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:39,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971194535] [2021-07-09 18:33:39,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971194535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:39,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815376022] [2021-07-09 18:33:39,932 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:39,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:33:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:40,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:40,512 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 29 treesize of output 25 [2021-07-09 18:33:40,513 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:40,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:40,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:40,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-07-09 18:33:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:40,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815376022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:40,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:40,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 25 [2021-07-09 18:33:40,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488032480] [2021-07-09 18:33:40,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:33:40,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:33:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:33:40,722 INFO L87 Difference]: Start difference. First operand 7945 states and 26937 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2021-07-09 18:33:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:33:42,457 INFO L93 Difference]: Finished difference Result 10446 states and 34982 transitions. [2021-07-09 18:33:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:33:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 30 [2021-07-09 18:33:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:33:42,479 INFO L225 Difference]: With dead ends: 10446 [2021-07-09 18:33:42,479 INFO L226 Difference]: Without dead ends: 10399 [2021-07-09 18:33:42,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1713.1ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:33:42,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10399 states. [2021-07-09 18:33:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10399 to 7943. [2021-07-09 18:33:42,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7943 states, 7942 states have (on average 3.390833543188114) internal successors, (26930), 7942 states have internal predecessors, (26930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:33:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7943 states to 7943 states and 26930 transitions. [2021-07-09 18:33:42,622 INFO L78 Accepts]: Start accepts. Automaton has 7943 states and 26930 transitions. Word has length 30 [2021-07-09 18:33:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:33:42,622 INFO L482 AbstractCegarLoop]: Abstraction has 7943 states and 26930 transitions. [2021-07-09 18:33:42,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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) [2021-07-09 18:33:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7943 states and 26930 transitions. [2021-07-09 18:33:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:33:42,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:33:42,634 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:33:42,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:42,835 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:33:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:33:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1525251902, now seen corresponding path program 164 times [2021-07-09 18:33:42,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:33:42,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682468420] [2021-07-09 18:33:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:33:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:33:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:43,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:33:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682468420] [2021-07-09 18:33:43,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682468420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543858141] [2021-07-09 18:33:43,402 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:33:43,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:33:43,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:33:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:33:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:33:43,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:43,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:33:43,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:43,851 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 23 treesize of output 23 [2021-07-09 18:33:43,852 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:33:43,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:33:43,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:33:43,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:17 [2021-07-09 18:33:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:33:44,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543858141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:33:44,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:33:44,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-07-09 18:33:44,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516531779] [2021-07-09 18:33:44,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:33:44,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:33:44,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:33:44,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:33:44,056 INFO L87 Difference]: Start difference. First operand 7943 states and 26930 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2021-07-09 18:33:45,997 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 Received shutdown request... [2021-07-09 18:33:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:33:46,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-07-09 18:33:46,327 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:33:46,329 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:33:46,330 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:33:46,331 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:33:46 BasicIcfg [2021-07-09 18:33:46,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:33:46,331 INFO L168 Benchmark]: Toolchain (without parser) took 811603.75 ms. Allocated memory was 198.2 MB in the beginning and 1.1 GB in the end (delta: 867.2 MB). Free memory was 178.2 MB in the beginning and 582.7 MB in the end (delta: -404.5 MB). Peak memory consumption was 464.2 MB. Max. memory is 8.0 GB. [2021-07-09 18:33:46,331 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 198.2 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:33:46,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.38 ms. Allocated memory is still 198.2 MB. Free memory was 178.1 MB in the beginning and 176.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:33:46,331 INFO L168 Benchmark]: Boogie Preprocessor took 13.97 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.7 MB in the end (delta: 935.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:33:46,331 INFO L168 Benchmark]: RCFGBuilder took 235.05 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 164.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:33:46,331 INFO L168 Benchmark]: TraceAbstraction took 811331.06 ms. Allocated memory was 198.2 MB in the beginning and 1.1 GB in the end (delta: 867.2 MB). Free memory was 163.5 MB in the beginning and 582.7 MB in the end (delta: -419.2 MB). Peak memory consumption was 449.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:33:46,331 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 0.09 ms. Allocated memory is still 198.2 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.38 ms. Allocated memory is still 198.2 MB. Free memory was 178.1 MB in the beginning and 176.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.97 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.7 MB in the end (delta: 935.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 235.05 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 164.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 811331.06 ms. Allocated memory was 198.2 MB in the beginning and 1.1 GB in the end (delta: 867.2 MB). Free memory was 163.5 MB in the beginning and 582.7 MB in the end (delta: -419.2 MB). Peak memory consumption was 449.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (7943states) and FLOYD_HOARE automaton (currently 22 states, 23 states before enhancement),while ReachableStatesComputation was computing reachable states (238 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 811208.0ms, OverallIterations: 273, TraceHistogramMax: 2, EmptinessCheckTime: 2368.7ms, AutomataDifference: 561158.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16557 SDtfs, 68077 SDslu, 150506 SDs, 0 SdLazy, 311131 SolverSat, 16417 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 196781.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18201 GetRequests, 5533 SyntacticMatches, 350 SemanticMatches, 12318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227213 ImplicationChecksByTransitivity, 444378.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8000occurred in iteration=257, InterpolantAutomatonStates: 10428, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 29426.3ms AutomataMinimizationTime, 272 MinimizatonAttempts, 606168 StatesRemovedByMinimization, 272 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 799.8ms SsaConstructionTime, 2234.5ms SatisfiabilityAnalysisTime, 156083.0ms InterpolantComputationTime, 15627 NumberOfCodeBlocks, 15623 NumberOfCodeBlocksAsserted, 855 NumberOfCheckSat, 15089 ConstructedInterpolants, 260 QuantifiedInterpolants, 231277 SizeOfPredicates, 1834 NumberOfNonLiveVariables, 17116 ConjunctsInSsa, 5745 ConjunctsInUnsatCore, 538 InterpolantComputations, 8 PerfectInterpolantSequences, 198/3763 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