/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:26:09,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:26:09,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:26:09,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 16:26:09,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 16:26:09,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 16:26:09,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 16:26:09,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 16:26:09,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 16:26:09,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 16:26:09,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 16:26:09,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 16:26:09,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 16:26:09,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 16:26:09,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 16:26:09,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 16:26:09,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 16:26:09,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 16:26:09,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 16:26:09,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 16:26:09,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 16:26:09,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 16:26:09,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 16:26:09,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 16:26:09,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 16:26:09,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 16:26:09,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 16:26:09,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 16:26:09,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 16:26:09,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 16:26:09,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 16:26:09,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 16:26:09,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 16:26:09,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 16:26:09,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 16:26:09,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 16:26:09,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 16:26:09,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 16:26:09,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:26:09,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:26:09,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:26:09,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 16:26:09,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:26:09,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:26:09,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:26:09,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:26:09,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:26:09,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:26:09,358 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:26:09,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:26:09,359 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:26:09,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:26:09,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:26:09,361 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:26:09,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:26:09,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:26:09,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:26:09,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:26:09,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:26:09,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:26:09,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:26:09,362 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:26:09,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:26:09,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:26:09,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:26:09,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:26:09,667 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:26:09,669 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:26:09,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-06-05 16:26:09,670 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-06-05 16:26:09,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:26:09,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:26:09,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:26:09,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:26:09,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:26:09,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:26:09,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:26:09,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:26:09,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:26:09,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... [2021-06-05 16:26:09,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:26:09,735 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:26:09,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:26:09,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:26:09,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:26:09,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:26:09,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:26:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:26:09,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:26:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:26:09,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:26:09,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:26:09,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:26:09,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:26:09,794 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:26:09,987 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:26:09,987 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:26:09,988 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:26:09 BoogieIcfgContainer [2021-06-05 16:26:09,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:26:10,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:26:10,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:26:10,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:26:10,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:26:09" (1/2) ... [2021-06-05 16:26:10,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc6387f and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:26:10, skipping insertion in model container [2021-06-05 16:26:10,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:26:09" (2/2) ... [2021-06-05 16:26:10,005 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-06-05 16:26:10,009 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:26:10,010 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:26:10,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:26:10,010 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:26:10,057 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 16:26:10,073 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 16:26:10,090 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:26:10,091 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:26:10,091 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:26:10,091 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:26:10,091 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:26:10,091 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:26:10,091 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:26:10,098 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:26:10,107 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 16:26:10,118 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 16:26:10,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:10,126 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:10,126 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:10,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 16:26:10,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:10,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467202176] [2021-06-05 16:26:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:10,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467202176] [2021-06-05 16:26:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467202176] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:26:10,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:26:10,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:26:10,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162336337] [2021-06-05 16:26:10,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:26:10,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:10,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:26:10,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:26:10,259 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:10,279 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 16:26:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:26:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 16:26:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:10,288 INFO L225 Difference]: With dead ends: 104 [2021-06-05 16:26:10,288 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 16:26:10,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:26:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 16:26:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 16:26:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 16:26:10,343 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 16:26:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:10,343 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 16:26:10,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 16:26:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:26:10,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:10,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:10,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:26:10,345 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 16:26:10,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989284406] [2021-06-05 16:26:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:10,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989284406] [2021-06-05 16:26:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989284406] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:26:10,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:26:10,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:26:10,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990051875] [2021-06-05 16:26:10,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:26:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:10,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:26:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:26:10,413 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:10,460 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 16:26:10,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:26:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 16:26:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:10,464 INFO L225 Difference]: With dead ends: 91 [2021-06-05 16:26:10,464 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 16:26:10,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:26:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 16:26:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 16:26:10,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 16:26:10,472 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 16:26:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:10,474 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 16:26:10,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 16:26:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 16:26:10,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:10,477 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:10,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:26:10,477 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 16:26:10,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:10,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897494463] [2021-06-05 16:26:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:10,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:10,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897494463] [2021-06-05 16:26:10,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897494463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676736859] [2021-06-05 16:26:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 16:26:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:10,923 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 13 treesize of output 9 [2021-06-05 16:26:10,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:10,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:10,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:10,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 16:26:10,971 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 [2021-06-05 16:26:10,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:10,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:10,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:10,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 16:26:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:11,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676736859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:11,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:11,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 16:26:11,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583280149] [2021-06-05 16:26:11,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:26:11,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:11,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:26:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:26:11,014 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:11,143 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 16:26:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:26:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 16:26:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:11,146 INFO L225 Difference]: With dead ends: 154 [2021-06-05 16:26:11,147 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 16:26:11,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:26:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 16:26:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 16:26:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 16:26:11,168 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 16:26:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:11,168 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 16:26:11,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 16:26:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:26:11,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:11,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:11,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 16:26:11,370 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:11,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 16:26:11,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:11,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928504880] [2021-06-05 16:26:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:11,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:11,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928504880] [2021-06-05 16:26:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928504880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:11,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611387972] [2021-06-05 16:26:11,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:11,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:26:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:11,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 16:26:11,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:11,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611387972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:11,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:11,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 16:26:11,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756163106] [2021-06-05 16:26:11,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:26:11,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:11,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:26:11,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:26:11,536 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:11,611 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 16:26:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:26:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 [2021-06-05 16:26:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:11,613 INFO L225 Difference]: With dead ends: 284 [2021-06-05 16:26:11,614 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 16:26:11,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:26:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 16:26:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 16:26:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 16:26:11,626 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 16:26:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:11,626 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 16:26:11,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 16:26:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:26:11,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:11,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:11,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:11,845 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:11,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:11,845 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 16:26:11,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:11,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516882495] [2021-06-05 16:26:11,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:12,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:12,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516882495] [2021-06-05 16:26:12,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516882495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:12,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683163636] [2021-06-05 16:26:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:12,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:26:12,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:26:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:12,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,451 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 29 treesize of output 27 [2021-06-05 16:26:12,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:12,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:12,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 16:26:12,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2021-06-05 16:26:12,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:26:12,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:12,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:12,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 16:26:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683163636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:12,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:12,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 16:26:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269789691] [2021-06-05 16:26:12,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:26:12,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:26:12,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:26:12,872 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:14,781 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 16:26:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:26:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 16:26:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:14,786 INFO L225 Difference]: With dead ends: 650 [2021-06-05 16:26:14,786 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 16:26:14,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1606.1ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 16:26:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 16:26:14,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 16:26:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:14,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 16:26:14,802 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 16:26:14,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:14,802 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 16:26:14,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:14,802 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 16:26:14,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:26:14,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:14,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:15,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:15,028 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 16:26:15,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:15,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965332952] [2021-06-05 16:26:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:26:15,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:15,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965332952] [2021-06-05 16:26:15,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965332952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:15,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163492573] [2021-06-05 16:26:15,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:15,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:26:15,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:15,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:26:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:15,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:15,649 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 26 treesize of output 26 [2021-06-05 16:26:15,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:15,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:15,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:15,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 16:26:15,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:15,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:15,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 10 [2021-06-05 16:26:15,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:15,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:15,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:15,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 16:26:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:15,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163492573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:15,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:15,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 16:26:15,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6542557] [2021-06-05 16:26:15,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:26:15,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:15,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:26:15,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:26:15,796 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-06-05 16:26:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:16,548 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 16:26:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:26:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 32 [2021-06-05 16:26:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:16,558 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 16:26:16,559 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 16:26:16,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:26:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 16:26:16,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 16:26:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 16:26:16,588 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 16:26:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:16,590 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 16:26:16,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-06-05 16:26:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 16:26:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:26:16,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:16,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:16,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:16,813 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:16,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 16:26:16,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:16,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818842767] [2021-06-05 16:26:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:17,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:17,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818842767] [2021-06-05 16:26:17,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818842767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:17,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277225915] [2021-06-05 16:26:17,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:17,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:26:17,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:17,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 16:26:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:17,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:17,345 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 24 treesize of output 24 [2021-06-05 16:26:17,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:17,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:17,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:17,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 16:26:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:17,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:17,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 10 [2021-06-05 16:26:17,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:17,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:17,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:17,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 16:26:17,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:17,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277225915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:17,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:17,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 16:26:17,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128719470] [2021-06-05 16:26:17,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:26:17,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:17,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:26:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:26:17,508 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) 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) [2021-06-05 16:26:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:18,312 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 16:26:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:26:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) 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 32 [2021-06-05 16:26:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:18,317 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 16:26:18,317 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 16:26:18,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 714.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:26:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 16:26:18,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 16:26:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 16:26:18,332 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 16:26:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:18,332 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 16:26:18,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) 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) [2021-06-05 16:26:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 16:26:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:26:18,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:18,333 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:18,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 16:26:18,545 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 16:26:18,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:18,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809085693] [2021-06-05 16:26:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:26:18,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:18,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809085693] [2021-06-05 16:26:18,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809085693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:18,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067051161] [2021-06-05 16:26:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:18,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:26:18,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 16:26:18,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:19,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:19,047 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 24 treesize of output 24 [2021-06-05 16:26:19,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:19,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:19,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:19,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-06-05 16:26:19,092 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 16:26:19,093 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 22 treesize of output 10 [2021-06-05 16:26:19,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:19,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:19,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:19,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-06-05 16:26:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:19,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067051161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:19,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:19,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 16:26:19,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853147344] [2021-06-05 16:26:19,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 16:26:19,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 16:26:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:26:19,109 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:19,898 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-06-05 16:26:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:26:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 32 [2021-06-05 16:26:19,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:19,902 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 16:26:19,902 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 16:26:19,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:26:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 16:26:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-06-05 16:26:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-06-05 16:26:19,917 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-06-05 16:26:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:19,917 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-06-05 16:26:19,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-06-05 16:26:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 16:26:19,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:19,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:20,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:20,141 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 16:26:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:20,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600556082] [2021-06-05 16:26:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:20,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:20,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600556082] [2021-06-05 16:26:20,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600556082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:20,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514562086] [2021-06-05 16:26:20,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 16:26:20,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:20,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:20,658 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 26 treesize of output 26 [2021-06-05 16:26:20,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:20,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:20,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:20,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 16:26:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:20,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:20,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-06-05 16:26:20,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:20,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:20,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:20,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 16:26:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:20,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514562086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:20,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:20,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 16:26:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132457019] [2021-06-05 16:26:20,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:26:20,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:20,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:26:20,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:26:20,802 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) 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) [2021-06-05 16:26:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:21,435 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-06-05 16:26:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:26:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) 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 32 [2021-06-05 16:26:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:21,440 INFO L225 Difference]: With dead ends: 1045 [2021-06-05 16:26:21,440 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 16:26:21,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 16:26:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 16:26:21,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-06-05 16:26:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-06-05 16:26:21,454 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-06-05 16:26:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:21,454 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-06-05 16:26:21,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) 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) [2021-06-05 16:26:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-06-05 16:26:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 16:26:21,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:21,455 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:21,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:21,678 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 16:26:21,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:21,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371553311] [2021-06-05 16:26:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:21,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:21,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371553311] [2021-06-05 16:26:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371553311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:21,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828119699] [2021-06-05 16:26:21,729 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 [2021-06-05 16:26:21,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:26:21,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:21,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 16:26:21,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828119699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:21,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:21,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 16:26:21,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614735165] [2021-06-05 16:26:21,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:26:21,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:26:21,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:26:21,818 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:21,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:21,887 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-06-05 16:26:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:26:21,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 16:26:21,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:21,891 INFO L225 Difference]: With dead ends: 882 [2021-06-05 16:26:21,891 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 16:26:21,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:26:21,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 16:26:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-06-05 16:26:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-06-05 16:26:21,907 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-06-05 16:26:21,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:21,907 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-06-05 16:26:21,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:21,907 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-06-05 16:26:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:26:21,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:21,909 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:22,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 16:26:22,132 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 16:26:22,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:22,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826438117] [2021-06-05 16:26:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:22,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826438117] [2021-06-05 16:26:22,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826438117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886247431] [2021-06-05 16:26:22,506 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 [2021-06-05 16:26:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:26:22,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 16:26:22,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:22,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:22,907 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 45 treesize of output 53 [2021-06-05 16:26:22,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:22,951 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-06-05 16:26:22,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:22,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-06-05 16:26:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:23,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:26:23,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 16:26:23,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:23,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:23,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 16:26:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:23,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886247431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:23,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:23,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 16:26:23,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445185367] [2021-06-05 16:26:23,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 16:26:23,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:23,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 16:26:23,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 16:26:23,387 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:27,234 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 16:26:27,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 16:26:27,235 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:26:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:27,243 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 16:26:27,244 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 16:26:27,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3161.1ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 16:26:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 16:26:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 16:26:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 16:26:27,269 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 16:26:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:27,269 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 16:26:27,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 16:26:27,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:26:27,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:27,271 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:27,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:27,493 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 16:26:27,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:27,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65408220] [2021-06-05 16:26:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:26:27,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:27,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65408220] [2021-06-05 16:26:27,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65408220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:27,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946953880] [2021-06-05 16:26:27,851 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 [2021-06-05 16:26:27,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:26:27,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:26:27,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:28,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:28,585 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 42 treesize of output 52 [2021-06-05 16:26:28,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:28,650 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 16:26:28,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:28,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 16:26:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:29,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:29,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:29,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:26:29,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:29,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:29,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:29,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:26:29,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:29,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:29,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:29,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 16:26:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:29,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946953880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:29,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:29,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 16:26:29,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826420503] [2021-06-05 16:26:29,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:26:29,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:26:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:26:29,066 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:31,284 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 16:26:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:26:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:26:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:31,290 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 16:26:31,290 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 16:26:31,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1885.6ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 16:26:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 16:26:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 16:26:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 16:26:31,314 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 16:26:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:31,315 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 16:26:31,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 16:26:31,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:26:31,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:31,316 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:31,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 16:26:31,539 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 16:26:31,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:31,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692459127] [2021-06-05 16:26:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:31,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:31,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692459127] [2021-06-05 16:26:31,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692459127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:31,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852053382] [2021-06-05 16:26:31,918 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 [2021-06-05 16:26:31,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:26:31,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 16:26:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:32,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:32,575 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 40 treesize of output 50 [2021-06-05 16:26:32,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:32,617 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-06-05 16:26:32,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:32,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-06-05 16:26:32,699 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 16:26:32,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 16:26:32,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:32,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:32,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:32,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-05 16:26:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:32,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852053382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:32,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:32,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-05 16:26:32,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146833070] [2021-06-05 16:26:32,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 16:26:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 16:26:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:26:32,720 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:34,911 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-06-05 16:26:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:26:34,911 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:26:34,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:34,918 INFO L225 Difference]: With dead ends: 2428 [2021-06-05 16:26:34,918 INFO L226 Difference]: Without dead ends: 2232 [2021-06-05 16:26:34,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1776.2ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 16:26:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-05 16:26:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-06-05 16:26:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-06-05 16:26:34,943 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-06-05 16:26:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:34,943 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-06-05 16:26:34,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-06-05 16:26:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:26:34,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:34,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:35,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:26:35,164 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:35,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 16:26:35,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:35,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801755699] [2021-06-05 16:26:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:26:35,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801755699] [2021-06-05 16:26:35,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801755699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:35,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194377267] [2021-06-05 16:26:35,526 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:35,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:26:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:26:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:36,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:36,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2021-06-05 16:26:36,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:36,532 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-06-05 16:26:36,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:36,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-06-05 16:26:37,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:37,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:37,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 16:26:37,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:26:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:37,333 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 16:26:37,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 16:26:37,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:37,354 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-06-05 16:26:37,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:37,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-06-05 16:26:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:37,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194377267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:37,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:37,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-05 16:26:37,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552374126] [2021-06-05 16:26:37,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 16:26:37,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:37,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 16:26:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:26:37,442 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:38,917 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 16:26:39,411 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-06-05 16:26:40,987 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 16:26:50,553 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:26:53,914 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-05 16:26:54,655 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 16:26:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:55,342 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-06-05 16:26:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-05 16:26:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:26:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:55,353 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 16:26:55,354 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 16:26:55,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 12507.9ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 16:26:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 16:26:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-06-05 16:26:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-06-05 16:26:55,389 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-06-05 16:26:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:55,389 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-06-05 16:26:55,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-06-05 16:26:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:26:55,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:55,392 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:55,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:55,605 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 16:26:55,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:55,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333825717] [2021-06-05 16:26:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:26:55,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:55,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333825717] [2021-06-05 16:26:55,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333825717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:55,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36735783] [2021-06-05 16:26:55,941 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:26:55,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:26:56,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:56,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 16:26:56,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:56,732 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 16:26:56,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:26:56,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 16:26:56,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:56,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:56,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:56,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:56,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:26:56,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:26:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:26:56,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:26:56,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:26:56,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:26:56,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 16:26:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:56,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36735783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:56,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:26:56,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 16:26:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52290517] [2021-06-05 16:26:56,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 16:26:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:26:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 16:26:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:26:56,835 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:59,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:26:59,071 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-06-05 16:26:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:26:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:26:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:26:59,083 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 16:26:59,084 INFO L226 Difference]: Without dead ends: 3805 [2021-06-05 16:26:59,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1604.4ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:26:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-05 16:26:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-06-05 16:26:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-06-05 16:26:59,120 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-06-05 16:26:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:26:59,120 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-06-05 16:26:59,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:26:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-06-05 16:26:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:26:59,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:26:59,123 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:26:59,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 16:26:59,337 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:26:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:26:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 16:26:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:26:59,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358542901] [2021-06-05 16:26:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:26:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:26:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:26:59,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:26:59,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358542901] [2021-06-05 16:26:59,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358542901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:26:59,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236778052] [2021-06-05 16:26:59,699 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:26:59,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:26:59,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:26:59,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 16:26:59,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:00,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:00,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 16:27:00,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:00,454 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 16:27:00,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:00,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 16:27:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:00,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:00,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:00,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:00,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:00,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 16:27:00,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:00,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:00,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:00,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 16:27:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:00,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236778052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:00,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:00,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 16:27:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384807867] [2021-06-05 16:27:00,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 16:27:00,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 16:27:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:27:00,637 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:03,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:03,030 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-06-05 16:27:03,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:27:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:27:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:03,042 INFO L225 Difference]: With dead ends: 4414 [2021-06-05 16:27:03,042 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 16:27:03,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1924.2ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:27:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 16:27:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-06-05 16:27:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-06-05 16:27:03,087 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-06-05 16:27:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:03,087 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-06-05 16:27:03,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-06-05 16:27:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 16:27:03,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:03,091 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:03,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:03,314 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 16:27:03,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:03,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032919364] [2021-06-05 16:27:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:03,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:03,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032919364] [2021-06-05 16:27:03,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032919364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:03,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395857213] [2021-06-05 16:27:03,726 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:03,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:27:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:03,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 16:27:03,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:04,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:04,198 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 40 treesize of output 50 [2021-06-05 16:27:04,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:04,257 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-06-05 16:27:04,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:04,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-06-05 16:27:04,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,659 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 16:27:04,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 16:27:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:04,749 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 16:27:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 16:27:04,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:04,830 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 16:27:04,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 16:27:04,845 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 16:27:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:04,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395857213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:04,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:04,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 16:27:04,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651353917] [2021-06-05 16:27:04,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 16:27:04,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:04,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 16:27:04,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:27:04,981 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:08,081 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-06-05 16:27:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:27:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 16:27:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:08,087 INFO L225 Difference]: With dead ends: 3956 [2021-06-05 16:27:08,087 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 16:27:08,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2652.8ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:27:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 16:27:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-06-05 16:27:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-06-05 16:27:08,127 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-06-05 16:27:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:08,127 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-06-05 16:27:08,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-06-05 16:27:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 16:27:08,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:08,130 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:08,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 16:27:08,353 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 16:27:08,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:08,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254946111] [2021-06-05 16:27:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:08,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254946111] [2021-06-05 16:27:08,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254946111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724000386] [2021-06-05 16:27:08,415 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:08,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:27:08,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 16:27:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:08,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724000386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:08,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:08,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 16:27:08,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087516361] [2021-06-05 16:27:08,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:27:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:27:08,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:27:08,517 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:08,597 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-06-05 16:27:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:27:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 16:27:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:08,601 INFO L225 Difference]: With dead ends: 2387 [2021-06-05 16:27:08,601 INFO L226 Difference]: Without dead ends: 2337 [2021-06-05 16:27:08,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:27:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-05 16:27:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-06-05 16:27:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-06-05 16:27:08,633 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-06-05 16:27:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:08,633 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-06-05 16:27:08,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-06-05 16:27:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:27:08,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:08,636 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:08,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:08,857 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 16:27:08,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:08,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547449124] [2021-06-05 16:27:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 16:27:08,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547449124] [2021-06-05 16:27:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547449124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207539292] [2021-06-05 16:27:08,892 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:08,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 16:27:08,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:27:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 16:27:08,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207539292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:08,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:08,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 16:27:08,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220688440] [2021-06-05 16:27:09,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 16:27:09,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:09,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 16:27:09,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:27:09,001 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:09,024 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-06-05 16:27:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 16:27:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 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 46 [2021-06-05 16:27:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:09,028 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 16:27:09,028 INFO L226 Difference]: Without dead ends: 2477 [2021-06-05 16:27:09,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 16:27:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-05 16:27:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-06-05 16:27:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-06-05 16:27:09,057 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-06-05 16:27:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:09,057 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-06-05 16:27:09,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-06-05 16:27:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 16:27:09,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:09,060 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:09,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:09,282 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:09,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 16:27:09,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:09,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161544084] [2021-06-05 16:27:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 16:27:09,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:09,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161544084] [2021-06-05 16:27:09,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161544084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:09,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816218174] [2021-06-05 16:27:09,316 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:09,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 16:27:09,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 16:27:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 16:27:09,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816218174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:09,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:09,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 16:27:09,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891714410] [2021-06-05 16:27:09,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 16:27:09,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:09,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 16:27:09,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:27:09,408 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:09,441 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-06-05 16:27:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 16:27:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 46 [2021-06-05 16:27:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:09,444 INFO L225 Difference]: With dead ends: 1749 [2021-06-05 16:27:09,444 INFO L226 Difference]: Without dead ends: 1749 [2021-06-05 16:27:09,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:27:09,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-06-05 16:27:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-06-05 16:27:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-06-05 16:27:09,466 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-06-05 16:27:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:09,466 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-06-05 16:27:09,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-06-05 16:27:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 16:27:09,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:09,469 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:09,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 16:27:09,692 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:09,692 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 16:27:09,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:09,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903179917] [2021-06-05 16:27:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:10,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:10,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903179917] [2021-06-05 16:27:10,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903179917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:10,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136581461] [2021-06-05 16:27:10,276 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:27:10,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:10,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:10,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 16:27:10,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:11,009 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-06-05 16:27:11,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:11,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-06-05 16:27:11,465 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 16:27:11,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 16:27:11,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:11,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:11,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:11,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 16:27:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:11,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136581461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:11,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:11,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 16:27:11,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728090543] [2021-06-05 16:27:11,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 16:27:11,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:11,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 16:27:11,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 16:27:11,479 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:15,135 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-06-05 16:27:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 16:27:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 16:27:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:15,138 INFO L225 Difference]: With dead ends: 2993 [2021-06-05 16:27:15,139 INFO L226 Difference]: Without dead ends: 2897 [2021-06-05 16:27:15,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2631.5ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 16:27:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-05 16:27:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-06-05 16:27:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-06-05 16:27:15,166 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-06-05 16:27:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:15,166 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-06-05 16:27:15,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-06-05 16:27:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 16:27:15,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:15,169 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:15,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:15,385 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 16:27:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:15,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544261011] [2021-06-05 16:27:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:27:15,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:15,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544261011] [2021-06-05 16:27:15,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544261011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:15,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169140396] [2021-06-05 16:27:15,885 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:15,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:27:15,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:15,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 16:27:15,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:17,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:17,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 16:27:17,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:17,135 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 16:27:17,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:27:17,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 16:27:17,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:17,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:17,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:17,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:17,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-05 16:27:17,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:17,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:27:17,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:27:17,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-05 16:27:17,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:17,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:17,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:27:17,729 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 16:27:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:17,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169140396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:17,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:27:17,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 16:27:17,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724909845] [2021-06-05 16:27:17,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 16:27:17,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:27:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 16:27:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:27:17,738 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:23,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:27:23,061 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-06-05 16:27:23,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 16:27:23,062 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 16:27:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:27:23,066 INFO L225 Difference]: With dead ends: 3235 [2021-06-05 16:27:23,066 INFO L226 Difference]: Without dead ends: 3122 [2021-06-05 16:27:23,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4362.7ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 16:27:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-06-05 16:27:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-06-05 16:27:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-06-05 16:27:23,094 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-06-05 16:27:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:27:23,094 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-06-05 16:27:23,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:27:23,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-06-05 16:27:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 16:27:23,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:27:23,097 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:27:23,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 16:27:23,317 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:27:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:27:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 16:27:23,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:27:23,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513411566] [2021-06-05 16:27:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:27:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:27:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:27:23,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:27:23,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513411566] [2021-06-05 16:27:23,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513411566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:27:23,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081585191] [2021-06-05 16:27:23,840 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:27:23,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 16:27:23,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:27:23,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 16:27:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:27:26,119 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 16:27:26,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:26,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 16:27:26,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:26,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:27:26,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 16:27:26,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 16:27:26,531 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-06-05 16:27:26,532 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-06-05 16:27:26,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 16:27:26,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-06-05 16:27:35,279 WARN L205 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 16:28:05,590 WARN L205 SmtUtils]: Spent 14.02 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 16:28:05,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:28:05,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:28:05,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:28:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:28:05,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:28:05,884 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 16:28:05,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 16:28:06,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 16:28:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:28:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:28:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:28:06,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:28:06,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 16:28:07,082 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-05 16:28:07,212 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-05 16:28:07,354 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-06-05 16:28:08,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-05 16:28:08,439 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-06-05 16:28:08,439 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-06-05 16:28:08,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:28:08,466 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-06-05 16:28:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:28:08,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081585191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:28:08,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:28:08,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 16:28:08,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799700299] [2021-06-05 16:28:08,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 16:28:08,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:28:08,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 16:28:08,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2267, Unknown=4, NotChecked=0, Total=2550 [2021-06-05 16:28:08,604 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:28:29,549 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-06-05 16:28:38,887 WARN L205 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-06-05 16:29:01,879 WARN L205 SmtUtils]: Spent 10.85 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-05 16:29:18,792 WARN L205 SmtUtils]: Spent 10.47 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-05 16:29:31,252 WARN L205 SmtUtils]: Spent 4.91 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 16:29:38,830 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-06-05 16:29:57,606 WARN L205 SmtUtils]: Spent 13.26 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-06-05 16:30:03,020 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-06-05 16:30:14,276 WARN L205 SmtUtils]: Spent 6.48 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-05 16:30:27,578 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-06-05 16:30:38,383 WARN L205 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 122 DAG size of output: 48 [2021-06-05 16:30:48,913 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-06-05 16:30:54,312 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-06-05 16:31:03,796 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-06-05 16:31:21,603 WARN L205 SmtUtils]: Spent 12.74 s on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2021-06-05 16:31:33,666 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-05 16:31:41,955 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-06-05 16:32:05,711 WARN L205 SmtUtils]: Spent 14.96 s on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-06-05 16:32:17,228 WARN L205 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 16:32:32,234 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-06-05 16:32:50,460 WARN L205 SmtUtils]: Spent 9.69 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-05 16:32:58,242 WARN L205 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-06-05 16:33:07,110 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-06-05 16:33:21,723 WARN L205 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2021-06-05 16:33:47,710 WARN L205 SmtUtils]: Spent 14.63 s on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-06-05 16:33:52,058 WARN L205 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-06-05 16:34:03,612 WARN L205 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 126 DAG size of output: 51 [2021-06-05 16:34:25,541 WARN L205 SmtUtils]: Spent 13.75 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-05 16:34:51,675 WARN L205 SmtUtils]: Spent 12.84 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-06-05 16:35:04,922 WARN L205 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-05 16:35:22,427 WARN L205 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-06-05 16:35:59,921 WARN L205 SmtUtils]: Spent 15.79 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-06-05 16:36:30,412 WARN L205 SmtUtils]: Spent 13.96 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-06-05 16:36:44,860 WARN L205 SmtUtils]: Spent 4.88 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-05 16:37:01,065 WARN L205 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 16:37:10,096 WARN L205 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-05 16:37:53,304 WARN L205 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-06-05 16:38:11,746 WARN L205 SmtUtils]: Spent 11.82 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-06-05 16:38:24,088 WARN L205 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-05 16:38:37,591 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-06-05 16:38:58,837 WARN L205 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-06-05 16:39:24,404 WARN L205 SmtUtils]: Spent 12.95 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-06-05 16:39:53,941 WARN L205 SmtUtils]: Spent 13.47 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2021-06-05 16:40:27,270 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 118 DAG size of output: 66 Received shutdown request... [2021-06-05 16:40:38,426 WARN L222 SmtUtils]: Removed 11 from assertion stack [2021-06-05 16:40:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-06-05 16:40:38,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:40:38,627 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 16:40:38,629 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 16:40:38,630 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 16:40:38,630 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:40:38 BasicIcfg [2021-06-05 16:40:38,630 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 16:40:38,631 INFO L168 Benchmark]: Toolchain (without parser) took 868930.62 ms. Allocated memory was 341.8 MB in the beginning and 494.9 MB in the end (delta: 153.1 MB). Free memory was 321.7 MB in the beginning and 221.5 MB in the end (delta: 100.2 MB). Peak memory consumption was 255.8 MB. Max. memory is 16.0 GB. [2021-06-05 16:40:38,631 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 341.8 MB. Free memory was 322.9 MB in the beginning and 322.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:40:38,631 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.71 ms. Allocated memory is still 341.8 MB. Free memory was 321.6 MB in the beginning and 320.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:40:38,631 INFO L168 Benchmark]: Boogie Preprocessor took 11.70 ms. Allocated memory is still 341.8 MB. Free memory was 320.2 MB in the beginning and 319.2 MB in the end (delta: 992.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:40:38,631 INFO L168 Benchmark]: RCFGBuilder took 253.70 ms. Allocated memory is still 341.8 MB. Free memory was 319.1 MB in the beginning and 306.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 16:40:38,631 INFO L168 Benchmark]: TraceAbstraction took 868630.37 ms. Allocated memory was 341.8 MB in the beginning and 494.9 MB in the end (delta: 153.1 MB). Free memory was 305.7 MB in the beginning and 221.5 MB in the end (delta: 84.2 MB). Peak memory consumption was 239.0 MB. Max. memory is 16.0 GB. [2021-06-05 16:40:38,631 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 0.13 ms. Allocated memory is still 341.8 MB. Free memory was 322.9 MB in the beginning and 322.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.71 ms. Allocated memory is still 341.8 MB. Free memory was 321.6 MB in the beginning and 320.2 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.70 ms. Allocated memory is still 341.8 MB. Free memory was 320.2 MB in the beginning and 319.2 MB in the end (delta: 992.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 253.70 ms. Allocated memory is still 341.8 MB. Free memory was 319.1 MB in the beginning and 306.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 868630.37 ms. Allocated memory was 341.8 MB in the beginning and 494.9 MB in the end (delta: 153.1 MB). Free memory was 305.7 MB in the beginning and 221.5 MB in the end (delta: 84.2 MB). Peak memory consumption was 239.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 113 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 93 for 2143ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 113 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 93 for 2143ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 113 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 93 for 2143ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 868539.6ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 52.3ms, AutomataDifference: 798230.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1083 SDtfs, 4960 SDslu, 11690 SDs, 0 SdLazy, 29170 SolverSat, 3224 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 87784.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1844 GetRequests, 588 SyntacticMatches, 37 SemanticMatches, 1218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40877 ImplicationChecksByTransitivity, 749039.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 530.7ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.7ms SsaConstructionTime, 470.0ms SatisfiabilityAnalysisTime, 63920.5ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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