/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/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:19:47,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:19:47,496 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:19:47,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:19:47,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 15:19:47,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 15:19:47,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 15:19:47,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 15:19:47,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 15:19:47,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 15:19:47,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 15:19:47,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 15:19:47,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 15:19:47,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 15:19:47,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 15:19:47,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 15:19:47,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 15:19:47,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:19:47,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:19:47,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:19:47,551 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 15:19:47,570 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:19:47,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:19:47,570 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:19:47,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:19:47,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:19:47,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:19:47,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:19:47,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:19:47,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:19:47,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:19:47,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:19:47,574 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:19:47,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:19:47,575 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:19:47,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:19:47,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:19:47,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:19:47,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:19:47,910 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:19:47,912 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:19:47,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-06-05 15:19:47,913 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-06-05 15:19:47,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:19:47,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:19:47,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:19:47,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:19:47,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:19:47,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:19:47,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:19:47,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:19:47,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:19:47,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... [2021-06-05 15:19:47,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:19:47,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:19:47,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:19:47,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:19:47,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:19:48,058 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:19:48,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:19:48,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:19:48,059 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:19:48,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:19:48,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:19:48,059 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:19:48,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:19:48,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:19:48,060 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 15:19:48,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:19:48,220 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:19:48,222 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:48 BoogieIcfgContainer [2021-06-05 15:19:48,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:19:48,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:19:48,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:19:48,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:19:48,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:47" (1/2) ... [2021-06-05 15:19:48,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c95f2e3 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:19:48, skipping insertion in model container [2021-06-05 15:19:48,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:48" (2/2) ... [2021-06-05 15:19:48,228 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-06-05 15:19:48,232 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:19:48,233 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:19:48,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:19:48,233 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:19:48,288 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 15:19:48,321 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 15:19:48,353 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:19:48,353 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:19:48,353 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:19:48,353 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:19:48,353 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:19:48,354 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:19:48,354 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:19:48,354 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:19:48,361 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-05 15:19:48,371 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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 15:19:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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 15:19:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 15:19:48,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:48,400 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:48,400 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-06-05 15:19:48,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734529249] [2021-06-05 15:19:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:48,573 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 15:19:48,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:48,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734529249] [2021-06-05 15:19:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734529249] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:48,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:48,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:19:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863461587] [2021-06-05 15:19:48,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:19:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:19:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:19:48,598 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) 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 15:19:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:48,631 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-06-05 15:19:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:19:48,634 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 15:19:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:48,646 INFO L225 Difference]: With dead ends: 57 [2021-06-05 15:19:48,646 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 15:19:48,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:19:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 15:19:48,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-06-05 15:19:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 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 15:19:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-06-05 15:19:48,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-06-05 15:19:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:48,689 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-06-05 15:19:48,689 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 15:19:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-06-05 15:19:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:19:48,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:48,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:48,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:19:48,691 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-06-05 15:19:48,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:48,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762988412] [2021-06-05 15:19:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:48,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:48,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762988412] [2021-06-05 15:19:48,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762988412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:48,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011813108] [2021-06-05 15:19:48,820 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 15:19:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:48,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:19:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:48,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011813108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:48,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:48,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 15:19:48,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739016694] [2021-06-05 15:19:48,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:19:48,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:48,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:19:48,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:19:48,975 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:49,086 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-06-05 15:19:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:19:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 15:19:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:49,087 INFO L225 Difference]: With dead ends: 63 [2021-06-05 15:19:49,087 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 15:19:49,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 15:19:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-05 15:19:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-06-05 15:19:49,094 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-06-05 15:19:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:49,095 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-06-05 15:19:49,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-06-05 15:19:49,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:19:49,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:49,096 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:49,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:19:49,317 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-06-05 15:19:49,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:49,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15460911] [2021-06-05 15:19:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:49,350 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 15:19:49,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15460911] [2021-06-05 15:19:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15460911] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:49,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:49,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:19:49,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354598949] [2021-06-05 15:19:49,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:49,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:49,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:49,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:49,353 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:49,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:49,426 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-06-05 15:19:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 15:19:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:49,435 INFO L225 Difference]: With dead ends: 50 [2021-06-05 15:19:49,436 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 15:19:49,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:19:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 15:19:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-06-05 15:19:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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 15:19:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-06-05 15:19:49,443 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-06-05 15:19:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:49,443 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-06-05 15:19:49,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-06-05 15:19:49,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:19:49,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:49,444 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 15:19:49,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:19:49,444 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:49,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:49,445 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-06-05 15:19:49,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:49,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007390742] [2021-06-05 15:19:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:49,491 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 15:19:49,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:49,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007390742] [2021-06-05 15:19:49,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007390742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148322557] [2021-06-05 15:19:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:19:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:49,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:49,618 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 15:19:49,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148322557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:49,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:49,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 15:19:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612295372] [2021-06-05 15:19:49,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:19:49,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:19:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:19:49,621 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 15:19:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:49,639 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-06-05 15:19:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:19:49,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 15:19:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:49,640 INFO L225 Difference]: With dead ends: 96 [2021-06-05 15:19:49,641 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 15:19:49,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:19:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 15:19:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-06-05 15:19:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-06-05 15:19:49,653 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-06-05 15:19:49,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:49,653 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-06-05 15:19:49,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 15:19:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-06-05 15:19:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:19:49,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:49,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:49,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:49,856 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:49,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-06-05 15:19:49,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:49,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193154889] [2021-06-05 15:19:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:49,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:49,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193154889] [2021-06-05 15:19:49,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193154889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:49,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641638723] [2021-06-05 15:19:49,928 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 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 15:19:49,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:49,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:50,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641638723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:50,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:50,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 15:19:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668673776] [2021-06-05 15:19:50,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:19:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:50,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:19:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:50,068 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:50,355 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-06-05 15:19:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:19:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:19:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:50,357 INFO L225 Difference]: With dead ends: 173 [2021-06-05 15:19:50,357 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 15:19:50,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:19:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 15:19:50,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-06-05 15:19:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-06-05 15:19:50,365 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-06-05 15:19:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:50,366 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-06-05 15:19:50,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-06-05 15:19:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:19:50,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:50,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:50,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:50,585 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:50,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-06-05 15:19:50,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:50,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640540474] [2021-06-05 15:19:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:50,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640540474] [2021-06-05 15:19:50,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640540474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:50,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252506515] [2021-06-05 15:19:50,655 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 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 15:19:50,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:19:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:50,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252506515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:50,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:50,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:19:50,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460443690] [2021-06-05 15:19:50,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:19:50,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:50,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:19:50,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:19:50,873 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:51,183 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-06-05 15:19:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:19:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:19:51,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:51,184 INFO L225 Difference]: With dead ends: 145 [2021-06-05 15:19:51,184 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 15:19:51,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:19:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 15:19:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-06-05 15:19:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-06-05 15:19:51,190 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-06-05 15:19:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:51,190 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-06-05 15:19:51,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,190 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-06-05 15:19:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:19:51,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:51,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:51,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:51,410 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:51,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-06-05 15:19:51,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:51,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142613180] [2021-06-05 15:19:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:51,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:51,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142613180] [2021-06-05 15:19:51,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142613180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:51,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491211314] [2021-06-05 15:19:51,479 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 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 15:19:51,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:51,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:51,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:19:51,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:51,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491211314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:51,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:51,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 15:19:51,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015566693] [2021-06-05 15:19:51,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:19:51,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:51,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:19:51,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:19:51,563 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:51,581 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-06-05 15:19:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:19:51,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:19:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:51,583 INFO L225 Difference]: With dead ends: 162 [2021-06-05 15:19:51,583 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 15:19:51,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:19:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 15:19:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-06-05 15:19:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-06-05 15:19:51,600 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-06-05 15:19:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:51,600 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-06-05 15:19:51,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-06-05 15:19:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:19:51,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:51,602 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:51,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 15:19:51,802 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-06-05 15:19:51,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:51,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869588225] [2021-06-05 15:19:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:51,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869588225] [2021-06-05 15:19:51,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869588225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:51,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459067262] [2021-06-05 15:19:51,904 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 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 15:19:51,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:19:51,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:19:51,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:52,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459067262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:52,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:52,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:19:52,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12704772] [2021-06-05 15:19:52,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:19:52,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:52,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:19:52,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:19:52,100 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:52,694 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-06-05 15:19:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:19:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:19:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:52,700 INFO L225 Difference]: With dead ends: 364 [2021-06-05 15:19:52,700 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 15:19:52,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:19:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 15:19:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-06-05 15:19:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-06-05 15:19:52,707 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-06-05 15:19:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:52,708 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-06-05 15:19:52,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-06-05 15:19:52,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:19:52,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:52,709 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:52,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:52,932 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:52,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-06-05 15:19:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:52,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913877579] [2021-06-05 15:19:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:52,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:52,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913877579] [2021-06-05 15:19:52,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913877579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:52,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553417136] [2021-06-05 15:19:52,999 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 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 15:19:53,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:19:53,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:19:53,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:53,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553417136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:53,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:53,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:19:53,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464894569] [2021-06-05 15:19:53,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:19:53,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:53,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:19:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:19:53,194 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:53,682 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-06-05 15:19:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:19:53,683 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:19:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:53,684 INFO L225 Difference]: With dead ends: 239 [2021-06-05 15:19:53,684 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 15:19:53,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:53,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 15:19:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-06-05 15:19:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-06-05 15:19:53,689 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-06-05 15:19:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:53,689 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-06-05 15:19:53,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-06-05 15:19:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:19:53,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:53,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:53,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:53,897 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-06-05 15:19:53,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:53,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143863248] [2021-06-05 15:19:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:53,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:53,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143863248] [2021-06-05 15:19:53,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143863248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:53,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984313745] [2021-06-05 15:19:53,973 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 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 15:19:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:19:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:54,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984313745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:54,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:54,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 15:19:54,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022177455] [2021-06-05 15:19:54,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:54,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:54,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:54,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:54,069 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:54,111 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-06-05 15:19:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:19:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:19:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:54,112 INFO L225 Difference]: With dead ends: 221 [2021-06-05 15:19:54,112 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 15:19:54,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 15:19:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-06-05 15:19:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-06-05 15:19:54,117 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-06-05 15:19:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:54,118 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-06-05 15:19:54,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-06-05 15:19:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:19:54,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:54,119 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:54,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:19:54,341 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-06-05 15:19:54,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:54,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15673740] [2021-06-05 15:19:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:54,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15673740] [2021-06-05 15:19:54,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15673740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010453164] [2021-06-05 15:19:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:54,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:54,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:19:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:54,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010453164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:54,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:54,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:19:54,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985207212] [2021-06-05 15:19:54,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:19:54,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:19:54,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:19:54,719 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:55,502 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-06-05 15:19:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:19:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:19:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:55,507 INFO L225 Difference]: With dead ends: 561 [2021-06-05 15:19:55,507 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 15:19:55,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 692.7ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:19:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 15:19:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-06-05 15:19:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-06-05 15:19:55,514 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-06-05 15:19:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:55,515 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-06-05 15:19:55,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-06-05 15:19:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:19:55,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:55,515 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:55,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:55,731 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:55,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-06-05 15:19:55,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:55,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375481259] [2021-06-05 15:19:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:55,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:55,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375481259] [2021-06-05 15:19:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375481259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:55,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439618030] [2021-06-05 15:19:55,805 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 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 15:19:55,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:19:55,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:55,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:19:55,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:56,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439618030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:56,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:56,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 15:19:56,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84052288] [2021-06-05 15:19:56,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:19:56,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:56,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:19:56,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:19:56,035 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:56,684 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-06-05 15:19:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:19:56,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:19:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:56,686 INFO L225 Difference]: With dead ends: 351 [2021-06-05 15:19:56,686 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 15:19:56,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 602.8ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:19:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 15:19:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-06-05 15:19:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-06-05 15:19:56,692 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-06-05 15:19:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:56,692 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-06-05 15:19:56,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-06-05 15:19:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:19:56,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:56,693 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:56,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:56,905 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-06-05 15:19:56,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:56,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307736469] [2021-06-05 15:19:56,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:56,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:56,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307736469] [2021-06-05 15:19:56,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307736469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:56,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939809741] [2021-06-05 15:19:56,983 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 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 15:19:57,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:57,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:19:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:57,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939809741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:57,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:57,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 15:19:57,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77536734] [2021-06-05 15:19:57,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:19:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:57,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:19:57,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:19:57,071 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:57,115 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-06-05 15:19:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:19:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:57,116 INFO L225 Difference]: With dead ends: 280 [2021-06-05 15:19:57,116 INFO L226 Difference]: Without dead ends: 241 [2021-06-05 15:19:57,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:19:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-05 15:19:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-06-05 15:19:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-06-05 15:19:57,122 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-06-05 15:19:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:57,122 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-06-05 15:19:57,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-06-05 15:19:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:57,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:57,123 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:57,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 15:19:57,337 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:57,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:57,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-06-05 15:19:57,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:57,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089930851] [2021-06-05 15:19:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:57,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089930851] [2021-06-05 15:19:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089930851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246011015] [2021-06-05 15:19:57,445 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 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 15:19:57,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:19:57,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:57,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:57,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246011015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:57,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:57,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 15:19:57,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375837388] [2021-06-05 15:19:57,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:19:57,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:19:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:19:57,724 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 15:19:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:58,844 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-06-05 15:19:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:19:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 32 [2021-06-05 15:19:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:58,847 INFO L225 Difference]: With dead ends: 786 [2021-06-05 15:19:58,847 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 15:19:58,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 948.0ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:19:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 15:19:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-06-05 15:19:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-06-05 15:19:58,856 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-06-05 15:19:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:58,856 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-06-05 15:19:58,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 15:19:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-06-05 15:19:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:58,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:58,857 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:59,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:19:59,073 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:59,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:59,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-06-05 15:19:59,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:59,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630761700] [2021-06-05 15:19:59,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:59,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:59,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630761700] [2021-06-05 15:19:59,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630761700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:59,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099670419] [2021-06-05 15:19:59,150 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 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 15:19:59,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:19:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:59,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099670419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:59,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:59,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 15:19:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632513352] [2021-06-05 15:19:59,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:19:59,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:59,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:19:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:19:59,444 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:00,521 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-06-05 15:20:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:20:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:20:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:00,524 INFO L225 Difference]: With dead ends: 485 [2021-06-05 15:20:00,524 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 15:20:00,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:20:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 15:20:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-06-05 15:20:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-06-05 15:20:00,536 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-06-05 15:20:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:00,536 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-06-05 15:20:00,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-06-05 15:20:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:20:00,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:00,537 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:00,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:20:00,757 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-06-05 15:20:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:00,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900053076] [2021-06-05 15:20:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:00,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:00,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900053076] [2021-06-05 15:20:00,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900053076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:00,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633448066] [2021-06-05 15:20:00,831 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 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 15:20:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:20:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:00,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633448066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:00,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:00,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 15:20:00,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799914976] [2021-06-05 15:20:00,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:20:00,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:20:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:20:00,924 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:00,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:00,979 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-06-05 15:20:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:20:00,980 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:20:00,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:00,982 INFO L225 Difference]: With dead ends: 339 [2021-06-05 15:20:00,982 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 15:20:00,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:20:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 15:20:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-06-05 15:20:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-06-05 15:20:00,990 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-06-05 15:20:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:00,991 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-06-05 15:20:00,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-06-05 15:20:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:00,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:00,991 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:01,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:01,209 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:01,210 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-06-05 15:20:01,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:01,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685473184] [2021-06-05 15:20:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:01,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:01,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685473184] [2021-06-05 15:20:01,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685473184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:01,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785701043] [2021-06-05 15:20:01,392 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 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 15:20:01,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:20:01,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:20:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:01,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785701043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:01,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:01,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 15:20:01,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452067604] [2021-06-05 15:20:01,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:20:01,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:01,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:20:01,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:20:01,749 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:03,639 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-06-05 15:20:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:20:03,639 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 15:20:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:03,642 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 15:20:03,642 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 15:20:03,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1640.7ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:20:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 15:20:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-06-05 15:20:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-06-05 15:20:03,653 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-06-05 15:20:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:03,653 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-06-05 15:20:03,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-06-05 15:20:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:03,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:03,654 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:03,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:20:03,869 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:03,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-06-05 15:20:03,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:03,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087087268] [2021-06-05 15:20:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:03,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:03,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087087268] [2021-06-05 15:20:03,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087087268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:03,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512689674] [2021-06-05 15:20:03,969 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 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 15:20:04,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 15:20:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:20:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:04,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512689674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:04,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:04,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-06-05 15:20:04,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5892953] [2021-06-05 15:20:04,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:20:04,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:04,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:20:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:20:04,275 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:05,611 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-06-05 15:20:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:20:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 15:20:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:05,614 INFO L225 Difference]: With dead ends: 641 [2021-06-05 15:20:05,614 INFO L226 Difference]: Without dead ends: 637 [2021-06-05 15:20:05,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1273.7ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:20:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-06-05 15:20:05,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-06-05 15:20:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-06-05 15:20:05,622 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-06-05 15:20:05,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:05,622 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-06-05 15:20:05,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-06-05 15:20:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:20:05,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:05,623 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:05,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:20:05,845 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-06-05 15:20:05,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:05,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009265234] [2021-06-05 15:20:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:05,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009265234] [2021-06-05 15:20:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009265234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466695841] [2021-06-05 15:20:05,940 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 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 15:20:05,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:20:05,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:20:05,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:06,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466695841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:06,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:06,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:20:06,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112612986] [2021-06-05 15:20:06,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:20:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:20:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:20:06,043 INFO L87 Difference]: Start difference. First operand 138 states and 278 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:06,123 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-06-05 15:20:06,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:20:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:20:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:06,125 INFO L225 Difference]: With dead ends: 398 [2021-06-05 15:20:06,125 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 15:20:06,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:20:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 15:20:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-06-05 15:20:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-06-05 15:20:06,131 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-06-05 15:20:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:06,132 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-06-05 15:20:06,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-06-05 15:20:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:20:06,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:06,132 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:06,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:06,357 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-06-05 15:20:06,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:06,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649278302] [2021-06-05 15:20:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:06,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649278302] [2021-06-05 15:20:06,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649278302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:06,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508878143] [2021-06-05 15:20:06,525 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 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 15:20:06,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:20:06,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:06,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:20:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508878143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:06,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:06,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:20:06,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657013602] [2021-06-05 15:20:06,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:20:06,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:06,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:20:06,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:20:06,884 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 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 15:20:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:08,935 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-06-05 15:20:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 15:20:08,935 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 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 40 [2021-06-05 15:20:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:08,938 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 15:20:08,938 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 15:20:08,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1789.3ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 15:20:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 15:20:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-06-05 15:20:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-06-05 15:20:08,950 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-06-05 15:20:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:08,950 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-06-05 15:20:08,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 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 15:20:08,950 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-06-05 15:20:08,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:20:08,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:08,950 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:09,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:09,173 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-06-05 15:20:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:09,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646603947] [2021-06-05 15:20:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:09,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646603947] [2021-06-05 15:20:09,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646603947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:09,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864269172] [2021-06-05 15:20:09,275 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 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 15:20:09,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:20:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:09,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:20:09,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:09,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864269172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:09,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:09,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-06-05 15:20:09,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295482989] [2021-06-05 15:20:09,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:20:09,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:20:09,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:20:09,641 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:11,609 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-06-05 15:20:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:20:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:20:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:11,611 INFO L225 Difference]: With dead ends: 819 [2021-06-05 15:20:11,611 INFO L226 Difference]: Without dead ends: 815 [2021-06-05 15:20:11,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1814.3ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 15:20:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-06-05 15:20:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-06-05 15:20:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-06-05 15:20:11,620 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-06-05 15:20:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:11,620 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-06-05 15:20:11,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-06-05 15:20:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:20:11,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:11,621 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:11,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:11,841 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-06-05 15:20:11,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:11,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55247545] [2021-06-05 15:20:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:11,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:11,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55247545] [2021-06-05 15:20:11,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55247545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113637781] [2021-06-05 15:20:11,949 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 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 15:20:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:20:11,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:12,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113637781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:12,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:12,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:20:12,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041669436] [2021-06-05 15:20:12,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:20:12,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:20:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:20:12,056 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:12,147 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-06-05 15:20:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:20:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 15:20:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:12,148 INFO L225 Difference]: With dead ends: 457 [2021-06-05 15:20:12,148 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 15:20:12,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:20:12,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 15:20:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-06-05 15:20:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-06-05 15:20:12,155 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-06-05 15:20:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:12,155 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-06-05 15:20:12,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-06-05 15:20:12,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:20:12,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:12,156 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:12,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:20:12,379 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-06-05 15:20:12,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:12,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785506231] [2021-06-05 15:20:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:12,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785506231] [2021-06-05 15:20:12,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785506231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:12,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910988064] [2021-06-05 15:20:12,587 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 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 15:20:12,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:20:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:20:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:13,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910988064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:13,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:13,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:20:13,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070853314] [2021-06-05 15:20:13,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:20:13,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:13,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:20:13,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:20:13,023 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:15,635 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-06-05 15:20:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 15:20:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:20:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:15,640 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 15:20:15,640 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 15:20:15,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2376.0ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 15:20:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 15:20:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-06-05 15:20:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-06-05 15:20:15,650 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-06-05 15:20:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:15,650 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-06-05 15:20:15,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-06-05 15:20:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 15:20:15,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:15,651 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:15,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:20:15,865 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:15,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:15,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-06-05 15:20:15,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:15,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891987656] [2021-06-05 15:20:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:15,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891987656] [2021-06-05 15:20:15,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891987656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:15,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280017028] [2021-06-05 15:20:15,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:16,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 15:20:16,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:16,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:20:16,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:16,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280017028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:16,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:16,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-06-05 15:20:16,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406607606] [2021-06-05 15:20:16,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:20:16,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:20:16,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:20:16,397 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:18,825 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-06-05 15:20:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 15:20:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 15:20:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:18,827 INFO L225 Difference]: With dead ends: 1019 [2021-06-05 15:20:18,827 INFO L226 Difference]: Without dead ends: 1015 [2021-06-05 15:20:18,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2284.0ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 15:20:18,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-06-05 15:20:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-06-05 15:20:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-06-05 15:20:18,834 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-06-05 15:20:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:18,834 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-06-05 15:20:18,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-06-05 15:20:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 15:20:18,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:18,835 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:19,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:19,057 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-06-05 15:20:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:19,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722361759] [2021-06-05 15:20:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:19,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:19,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722361759] [2021-06-05 15:20:19,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722361759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:19,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93050207] [2021-06-05 15:20:19,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:19,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:20:19,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:19,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:20:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:19,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93050207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:19,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:19,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:20:19,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421596762] [2021-06-05 15:20:19,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:20:19,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:20:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:20:19,242 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:19,353 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-06-05 15:20:19,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:20:19,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 15:20:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:19,355 INFO L225 Difference]: With dead ends: 516 [2021-06-05 15:20:19,355 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 15:20:19,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:20:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 15:20:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-06-05 15:20:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-06-05 15:20:19,361 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-06-05 15:20:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:19,361 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-06-05 15:20:19,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-06-05 15:20:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 15:20:19,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:19,361 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:19,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:20:19,562 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-06-05 15:20:19,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:19,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639351337] [2021-06-05 15:20:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:19,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:19,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639351337] [2021-06-05 15:20:19,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639351337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961508824] [2021-06-05 15:20:19,782 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:19,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:20:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:19,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:20:19,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:20,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961508824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:20,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:20,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-05 15:20:20,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052420106] [2021-06-05 15:20:20,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:20:20,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:20,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:20:20,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:20:20,291 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:23,729 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-06-05 15:20:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 15:20:23,729 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 15:20:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:23,733 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 15:20:23,733 INFO L226 Difference]: Without dead ends: 1630 [2021-06-05 15:20:23,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 3027.0ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 15:20:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-05 15:20:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-06-05 15:20:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-06-05 15:20:23,744 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-06-05 15:20:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:23,744 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-06-05 15:20:23,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-06-05 15:20:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 15:20:23,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:23,745 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:23,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:23,967 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:23,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-06-05 15:20:23,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:23,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330474416] [2021-06-05 15:20:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:24,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:24,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330474416] [2021-06-05 15:20:24,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330474416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:24,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079934931] [2021-06-05 15:20:24,091 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:24,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 15:20:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:20:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:24,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079934931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:24,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:24,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-05 15:20:24,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131641051] [2021-06-05 15:20:24,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:20:24,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:24,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:20:24,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:20:24,560 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 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 15:20:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:27,518 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-06-05 15:20:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 15:20:27,519 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 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 48 [2021-06-05 15:20:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:27,521 INFO L225 Difference]: With dead ends: 1241 [2021-06-05 15:20:27,521 INFO L226 Difference]: Without dead ends: 1237 [2021-06-05 15:20:27,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2791.8ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:20:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-06-05 15:20:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-06-05 15:20:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-06-05 15:20:27,529 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-06-05 15:20:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:27,529 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-06-05 15:20:27,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 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 15:20:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-06-05 15:20:27,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 15:20:27,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:27,530 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:27,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:20:27,737 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-06-05 15:20:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136827436] [2021-06-05 15:20:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:27,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136827436] [2021-06-05 15:20:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136827436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813456697] [2021-06-05 15:20:27,837 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:27,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:20:27,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:27,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813456697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:27,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:27,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:20:27,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161020677] [2021-06-05 15:20:27,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:20:27,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:27,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:20:27,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:20:27,953 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 15:20:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:28,065 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-06-05 15:20:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:20:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 50 [2021-06-05 15:20:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:28,067 INFO L225 Difference]: With dead ends: 575 [2021-06-05 15:20:28,067 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 15:20:28,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:20:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 15:20:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-06-05 15:20:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-06-05 15:20:28,072 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-06-05 15:20:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:28,072 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-06-05 15:20:28,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 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 15:20:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-06-05 15:20:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 15:20:28,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:28,074 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:28,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:20:28,289 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-06-05 15:20:28,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:28,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725930761] [2021-06-05 15:20:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:28,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725930761] [2021-06-05 15:20:28,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725930761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:28,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239589663] [2021-06-05 15:20:28,555 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:28,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:20:28,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:28,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:20:28,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:29,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239589663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:29,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:29,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 15:20:29,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556116753] [2021-06-05 15:20:29,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:20:29,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:20:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:20:29,125 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:33,397 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-06-05 15:20:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 15:20:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 15:20:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:33,402 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 15:20:33,402 INFO L226 Difference]: Without dead ends: 1923 [2021-06-05 15:20:33,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3844.1ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-06-05 15:20:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-06-05 15:20:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-06-05 15:20:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-06-05 15:20:33,412 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-06-05 15:20:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:33,412 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-06-05 15:20:33,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-06-05 15:20:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 15:20:33,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:33,413 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:33,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:20:33,629 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:33,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:33,629 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-06-05 15:20:33,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:33,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493300766] [2021-06-05 15:20:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:33,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:33,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493300766] [2021-06-05 15:20:33,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493300766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:33,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251496292] [2021-06-05 15:20:33,756 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 15:20:33,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:20:33,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:34,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251496292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:34,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:34,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-06-05 15:20:34,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54838068] [2021-06-05 15:20:34,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:20:34,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:34,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:20:34,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:20:34,258 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 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 15:20:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:38,001 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-06-05 15:20:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 15:20:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 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) Word has length 52 [2021-06-05 15:20:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:38,005 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 15:20:38,005 INFO L226 Difference]: Without dead ends: 1481 [2021-06-05 15:20:38,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3482.3ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 15:20:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-06-05 15:20:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-06-05 15:20:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-06-05 15:20:38,014 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-06-05 15:20:38,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:38,014 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-06-05 15:20:38,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 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 15:20:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-06-05 15:20:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 15:20:38,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:38,015 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:38,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:38,229 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-06-05 15:20:38,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:38,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343330584] [2021-06-05 15:20:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:38,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:38,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343330584] [2021-06-05 15:20:38,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343330584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:38,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639126446] [2021-06-05 15:20:38,358 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:38,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:20:38,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:20:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:38,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639126446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:38,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:38,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:20:38,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6368317] [2021-06-05 15:20:38,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:20:38,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:20:38,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:20:38,487 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:38,655 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-06-05 15:20:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:20:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 15:20:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:38,658 INFO L225 Difference]: With dead ends: 634 [2021-06-05 15:20:38,658 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 15:20:38,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:20:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 15:20:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-06-05 15:20:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-06-05 15:20:38,665 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-06-05 15:20:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:38,665 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-06-05 15:20:38,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-06-05 15:20:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 15:20:38,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:38,666 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:38,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:20:38,881 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-06-05 15:20:38,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:38,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128900618] [2021-06-05 15:20:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:39,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:39,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128900618] [2021-06-05 15:20:39,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128900618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:39,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595369646] [2021-06-05 15:20:39,156 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:39,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 15:20:39,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:39,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:20:39,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:39,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595369646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:39,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:39,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 15:20:39,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682514134] [2021-06-05 15:20:39,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 15:20:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:39,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 15:20:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:20:39,780 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:45,038 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-06-05 15:20:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 15:20:45,038 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 15:20:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:45,044 INFO L225 Difference]: With dead ends: 2724 [2021-06-05 15:20:45,045 INFO L226 Difference]: Without dead ends: 2238 [2021-06-05 15:20:45,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4623.1ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-06-05 15:20:45,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-06-05 15:20:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-06-05 15:20:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:45,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-06-05 15:20:45,061 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-06-05 15:20:45,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:45,061 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-06-05 15:20:45,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-06-05 15:20:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 15:20:45,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:45,062 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:45,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:45,273 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:45,273 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-06-05 15:20:45,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:45,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669246910] [2021-06-05 15:20:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:45,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:45,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669246910] [2021-06-05 15:20:45,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669246910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:45,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134816630] [2021-06-05 15:20:45,433 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:45,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 15:20:45,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:20:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:46,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134816630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:46,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:46,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-06-05 15:20:46,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430464117] [2021-06-05 15:20:46,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:20:46,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:20:46,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:20:46,075 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:50,619 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-06-05 15:20:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-05 15:20:50,619 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 15:20:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:50,623 INFO L225 Difference]: With dead ends: 1751 [2021-06-05 15:20:50,623 INFO L226 Difference]: Without dead ends: 1747 [2021-06-05 15:20:50,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 4366.8ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-06-05 15:20:50,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-06-05 15:20:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-06-05 15:20:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-06-05 15:20:50,635 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-06-05 15:20:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:50,635 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-06-05 15:20:50,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-06-05 15:20:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 15:20:50,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:50,636 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:50,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:20:50,841 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:50,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:50,841 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-06-05 15:20:50,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:50,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23995268] [2021-06-05 15:20:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:50,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23995268] [2021-06-05 15:20:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23995268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401137611] [2021-06-05 15:20:50,974 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:51,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:20:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:51,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401137611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:51,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:51,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 15:20:51,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145967860] [2021-06-05 15:20:51,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:20:51,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:51,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:20:51,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:20:51,108 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 15:20:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:51,295 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-06-05 15:20:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:20:51,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 58 [2021-06-05 15:20:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:51,302 INFO L225 Difference]: With dead ends: 693 [2021-06-05 15:20:51,303 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 15:20:51,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:20:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 15:20:51,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-06-05 15:20:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-06-05 15:20:51,309 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-06-05 15:20:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:51,310 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-06-05 15:20:51,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 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 15:20:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-06-05 15:20:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 15:20:51,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:51,311 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:51,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:20:51,534 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-06-05 15:20:51,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:51,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308696350] [2021-06-05 15:20:51,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:51,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:51,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308696350] [2021-06-05 15:20:51,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308696350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:51,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478641687] [2021-06-05 15:20:51,901 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:51,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:20:51,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:51,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:20:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:52,638 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:52,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478641687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:52,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:52,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-05 15:20:52,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987938167] [2021-06-05 15:20:52,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:20:52,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:20:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:20:52,640 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:59,000 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-06-05 15:20:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-05 15:20:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 15:20:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:59,003 INFO L225 Difference]: With dead ends: 3145 [2021-06-05 15:20:59,003 INFO L226 Difference]: Without dead ends: 2575 [2021-06-05 15:20:59,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 5779.4ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 15:20:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-06-05 15:20:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-06-05 15:20:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-06-05 15:20:59,016 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-06-05 15:20:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:59,016 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-06-05 15:20:59,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-06-05 15:20:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 15:20:59,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:59,017 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:59,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:20:59,231 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:59,232 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-06-05 15:20:59,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:59,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75306033] [2021-06-05 15:20:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:59,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75306033] [2021-06-05 15:20:59,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75306033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:59,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188351980] [2021-06-05 15:20:59,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:59,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 15:20:59,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:59,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:20:59,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:00,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188351980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:00,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:00,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-06-05 15:21:00,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942928286] [2021-06-05 15:21:00,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:21:00,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:21:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:21:00,084 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:05,529 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-06-05 15:21:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-05 15:21:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 15:21:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:05,531 INFO L225 Difference]: With dead ends: 2039 [2021-06-05 15:21:05,531 INFO L226 Difference]: Without dead ends: 2035 [2021-06-05 15:21:05,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 5150.4ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-06-05 15:21:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-06-05 15:21:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-06-05 15:21:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-06-05 15:21:05,540 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-06-05 15:21:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:05,540 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-06-05 15:21:05,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-06-05 15:21:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 15:21:05,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:05,541 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:05,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:21:05,742 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-06-05 15:21:05,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:05,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642403150] [2021-06-05 15:21:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:05,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:05,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642403150] [2021-06-05 15:21:05,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642403150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:05,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216268876] [2021-06-05 15:21:05,893 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:05,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:21:05,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:21:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:06,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216268876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:06,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:06,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 15:21:06,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708556189] [2021-06-05 15:21:06,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:21:06,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:21:06,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:21:06,024 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:06,214 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-06-05 15:21:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:21:06,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 15:21:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:06,215 INFO L225 Difference]: With dead ends: 752 [2021-06-05 15:21:06,215 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 15:21:06,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:21:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 15:21:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-06-05 15:21:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-06-05 15:21:06,222 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-06-05 15:21:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:06,222 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-06-05 15:21:06,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-06-05 15:21:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 15:21:06,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:06,224 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:06,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:21:06,439 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-06-05 15:21:06,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:06,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433191691] [2021-06-05 15:21:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:06,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433191691] [2021-06-05 15:21:06,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433191691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:06,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74075563] [2021-06-05 15:21:06,823 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:06,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:21:06,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:06,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:21:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:07,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74075563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:07,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:07,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-06-05 15:21:07,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222660648] [2021-06-05 15:21:07,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 15:21:07,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:07,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 15:21:07,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:21:07,630 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:15,321 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-06-05 15:21:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-05 15:21:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 15:21:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:15,325 INFO L225 Difference]: With dead ends: 3594 [2021-06-05 15:21:15,325 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 15:21:15,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 6932.4ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 15:21:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 15:21:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-06-05 15:21:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-06-05 15:21:15,339 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-06-05 15:21:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:15,339 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-06-05 15:21:15,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-06-05 15:21:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 15:21:15,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:15,340 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:15,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:21:15,557 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:15,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-06-05 15:21:15,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:15,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070787099] [2021-06-05 15:21:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:15,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:15,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070787099] [2021-06-05 15:21:15,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070787099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:15,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45576941] [2021-06-05 15:21:15,734 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:15,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 15:21:15,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:15,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:21:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:16,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45576941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:16,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:16,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-06-05 15:21:16,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380437187] [2021-06-05 15:21:16,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:21:16,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:16,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:21:16,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:21:16,479 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:23,028 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-06-05 15:21:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 15:21:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 15:21:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:23,031 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 15:21:23,031 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 15:21:23,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 6281.0ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-06-05 15:21:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 15:21:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-06-05 15:21:23,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-06-05 15:21:23,046 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-06-05 15:21:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:23,047 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-06-05 15:21:23,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-06-05 15:21:23,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 15:21:23,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:23,048 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:23,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:21:23,261 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-06-05 15:21:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:23,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343538456] [2021-06-05 15:21:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:23,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:23,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343538456] [2021-06-05 15:21:23,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343538456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:23,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516132495] [2021-06-05 15:21:23,434 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:21:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:23,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516132495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:23,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:23,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 15:21:23,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420813994] [2021-06-05 15:21:23,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:21:23,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:23,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:21:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:21:23,594 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:23,834 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-06-05 15:21:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:21:23,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 15:21:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:23,835 INFO L225 Difference]: With dead ends: 811 [2021-06-05 15:21:23,835 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 15:21:23,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:21:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 15:21:23,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-06-05 15:21:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-06-05 15:21:23,841 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-06-05 15:21:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:23,841 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-06-05 15:21:23,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-06-05 15:21:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-05 15:21:23,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:23,842 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:24,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:21:24,047 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:24,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-06-05 15:21:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:24,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959071034] [2021-06-05 15:21:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:24,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:24,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959071034] [2021-06-05 15:21:24,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959071034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:24,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029602277] [2021-06-05 15:21:24,436 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:24,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:21:24,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:24,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:21:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:25,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029602277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:25,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:25,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-06-05 15:21:25,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37024376] [2021-06-05 15:21:25,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-06-05 15:21:25,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:25,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-06-05 15:21:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:21:25,306 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:34,656 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-06-05 15:21:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-06-05 15:21:34,657 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-05 15:21:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:34,661 INFO L225 Difference]: With dead ends: 4071 [2021-06-05 15:21:34,661 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 15:21:34,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 8234.7ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-06-05 15:21:34,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 15:21:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-06-05 15:21:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-06-05 15:21:34,683 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-06-05 15:21:34,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:34,683 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-06-05 15:21:34,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:34,683 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-06-05 15:21:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-05 15:21:34,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:34,684 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:34,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:34,902 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-06-05 15:21:34,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:34,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431149981] [2021-06-05 15:21:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:35,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:35,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431149981] [2021-06-05 15:21:35,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431149981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:35,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502823487] [2021-06-05 15:21:35,129 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:35,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 15:21:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:21:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:35,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502823487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:35,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:35,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-06-05 15:21:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558051700] [2021-06-05 15:21:35,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:21:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:21:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:21:35,894 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:43,509 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-06-05 15:21:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 15:21:43,510 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-05 15:21:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:43,513 INFO L225 Difference]: With dead ends: 2681 [2021-06-05 15:21:43,513 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 15:21:43,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 7266.4ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-06-05 15:21:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 15:21:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-06-05 15:21:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-06-05 15:21:43,531 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-06-05 15:21:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:43,531 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-06-05 15:21:43,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-06-05 15:21:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 15:21:43,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:43,532 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:43,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:43,756 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:43,756 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-06-05 15:21:43,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:43,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152435767] [2021-06-05 15:21:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152435767] [2021-06-05 15:21:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152435767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610404789] [2021-06-05 15:21:43,943 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:43,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:21:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:21:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:44,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610404789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:44,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:44,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 15:21:44,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250204309] [2021-06-05 15:21:44,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:21:44,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:44,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:21:44,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:21:44,095 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:44,355 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-06-05 15:21:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:21:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 15:21:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:44,356 INFO L225 Difference]: With dead ends: 870 [2021-06-05 15:21:44,356 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 15:21:44,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:21:44,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 15:21:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-06-05 15:21:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-06-05 15:21:44,364 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-06-05 15:21:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:44,364 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-06-05 15:21:44,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-06-05 15:21:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 15:21:44,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:44,365 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:44,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:21:44,577 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-06-05 15:21:44,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:44,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207905540] [2021-06-05 15:21:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:45,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:45,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207905540] [2021-06-05 15:21:45,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207905540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:45,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994534013] [2021-06-05 15:21:45,045 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:45,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 15:21:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:21:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:45,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994534013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:45,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:45,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-05 15:21:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716409354] [2021-06-05 15:21:45,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 15:21:45,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 15:21:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:21:45,962 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:57,247 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-06-05 15:21:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-06-05 15:21:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-05 15:21:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:57,250 INFO L225 Difference]: With dead ends: 4576 [2021-06-05 15:21:57,250 INFO L226 Difference]: Without dead ends: 3718 [2021-06-05 15:21:57,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 9731.3ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-06-05 15:21:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-06-05 15:21:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-06-05 15:21:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-06-05 15:21:57,267 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-06-05 15:21:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:57,267 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-06-05 15:21:57,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-06-05 15:21:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 15:21:57,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:57,268 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:57,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:57,485 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-06-05 15:21:57,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:57,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090497641] [2021-06-05 15:21:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:57,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:57,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090497641] [2021-06-05 15:21:57,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090497641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:57,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056978839] [2021-06-05 15:21:57,726 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:57,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 15:21:57,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:57,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:21:57,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:58,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056978839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:58,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:58,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-05 15:21:58,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579579818] [2021-06-05 15:21:58,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:21:58,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:58,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:21:58,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:21:58,577 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:07,740 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-06-05 15:22:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-06-05 15:22:07,740 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-05 15:22:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:07,743 INFO L225 Difference]: With dead ends: 3035 [2021-06-05 15:22:07,743 INFO L226 Difference]: Without dead ends: 3031 [2021-06-05 15:22:07,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 8558.4ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-06-05 15:22:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-06-05 15:22:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-06-05 15:22:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-06-05 15:22:07,759 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-06-05 15:22:07,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:07,759 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-06-05 15:22:07,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-06-05 15:22:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-05 15:22:07,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:07,760 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:07,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:07,965 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:07,965 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-06-05 15:22:07,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:07,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714940272] [2021-06-05 15:22:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:08,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714940272] [2021-06-05 15:22:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714940272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:08,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503061846] [2021-06-05 15:22:08,162 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:22:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503061846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:08,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:08,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 15:22:08,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330696551] [2021-06-05 15:22:08,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:22:08,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:22:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:22:08,300 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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 15:22:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:08,581 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-06-05 15:22:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:22:08,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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 74 [2021-06-05 15:22:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:08,582 INFO L225 Difference]: With dead ends: 929 [2021-06-05 15:22:08,582 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 15:22:08,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:22:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 15:22:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-06-05 15:22:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-06-05 15:22:08,590 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-06-05 15:22:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:08,591 INFO L482 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-06-05 15:22:08,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 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 15:22:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-06-05 15:22:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:22:08,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:08,592 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:08,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 15:22:08,805 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:08,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-06-05 15:22:08,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:08,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720462147] [2021-06-05 15:22:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:09,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:09,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720462147] [2021-06-05 15:22:09,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720462147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:09,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712399479] [2021-06-05 15:22:09,283 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:09,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:22:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:10,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712399479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:10,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:10,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-06-05 15:22:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009272076] [2021-06-05 15:22:10,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 15:22:10,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 15:22:10,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:22:10,426 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:23,783 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-06-05 15:22:23,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-06-05 15:22:23,783 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 15:22:23,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:23,786 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 15:22:23,786 INFO L226 Difference]: Without dead ends: 4143 [2021-06-05 15:22:23,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 11540.4ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-06-05 15:22:23,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-06-05 15:22:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-06-05 15:22:23,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:23,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-06-05 15:22:23,806 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-06-05 15:22:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:23,806 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-06-05 15:22:23,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-06-05 15:22:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 15:22:23,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:23,807 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:24,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:22:24,012 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:24,012 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-06-05 15:22:24,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:24,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179933192] [2021-06-05 15:22:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:24,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:24,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179933192] [2021-06-05 15:22:24,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179933192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:24,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921301845] [2021-06-05 15:22:24,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:24,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-05 15:22:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:24,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:22:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:25,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921301845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:25,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:25,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-06-05 15:22:25,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393069387] [2021-06-05 15:22:25,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:22:25,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:25,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:22:25,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:22:25,210 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 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 15:22:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:36,015 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-06-05 15:22:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-06-05 15:22:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 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) Word has length 76 [2021-06-05 15:22:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:36,018 INFO L225 Difference]: With dead ends: 3411 [2021-06-05 15:22:36,018 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 15:22:36,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 10056.0ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-06-05 15:22:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 15:22:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-06-05 15:22:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-06-05 15:22:36,035 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-06-05 15:22:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:36,035 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-06-05 15:22:36,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 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 15:22:36,036 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-06-05 15:22:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-05 15:22:36,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:36,037 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:36,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:22:36,252 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:36,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-06-05 15:22:36,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:36,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057807938] [2021-06-05 15:22:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:36,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:36,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057807938] [2021-06-05 15:22:36,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057807938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:36,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352985308] [2021-06-05 15:22:36,497 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:36,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:22:36,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:22:36,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:36,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352985308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:36,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:36,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 15:22:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913538257] [2021-06-05 15:22:36,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:22:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:22:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:22:36,638 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:36,945 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-06-05 15:22:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:22:36,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-06-05 15:22:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:36,946 INFO L225 Difference]: With dead ends: 988 [2021-06-05 15:22:36,946 INFO L226 Difference]: Without dead ends: 877 [2021-06-05 15:22:36,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:22:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-05 15:22:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-06-05 15:22:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-06-05 15:22:36,953 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-06-05 15:22:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:36,954 INFO L482 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-06-05 15:22:36,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-06-05 15:22:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 15:22:36,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:36,955 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:37,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:37,169 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-06-05 15:22:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:37,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263735866] [2021-06-05 15:22:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:37,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:37,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263735866] [2021-06-05 15:22:37,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263735866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:37,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602492458] [2021-06-05 15:22:37,750 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:37,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 15:22:37,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:22:37,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:38,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602492458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:38,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:38,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-06-05 15:22:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025831145] [2021-06-05 15:22:38,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-06-05 15:22:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-06-05 15:22:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:22:38,915 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:55,216 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-06-05 15:22:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-06-05 15:22:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 15:22:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:55,219 INFO L225 Difference]: With dead ends: 5670 [2021-06-05 15:22:55,219 INFO L226 Difference]: Without dead ends: 4590 [2021-06-05 15:22:55,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 13785.2ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-06-05 15:22:55,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-06-05 15:22:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-06-05 15:22:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-06-05 15:22:55,241 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-06-05 15:22:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:55,241 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-06-05 15:22:55,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-06-05 15:22:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 15:22:55,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:55,242 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:55,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:22:55,457 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-06-05 15:22:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809108601] [2021-06-05 15:22:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:55,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:55,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809108601] [2021-06-05 15:22:55,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809108601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:55,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771534528] [2021-06-05 15:22:55,731 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:55,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-05 15:22:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:55,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:22:55,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:56,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771534528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:56,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:56,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-06-05 15:22:56,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373303344] [2021-06-05 15:22:56,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 15:22:56,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 15:22:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:22:56,807 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:09,255 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-06-05 15:23:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-06-05 15:23:09,256 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 15:23:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:09,258 INFO L225 Difference]: With dead ends: 3809 [2021-06-05 15:23:09,258 INFO L226 Difference]: Without dead ends: 3805 [2021-06-05 15:23:09,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 11781.6ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-06-05 15:23:09,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-05 15:23:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-06-05 15:23:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-06-05 15:23:09,275 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-06-05 15:23:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:09,275 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-06-05 15:23:09,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-06-05 15:23:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-05 15:23:09,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:09,276 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:09,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:09,477 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-06-05 15:23:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293139394] [2021-06-05 15:23:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:09,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:09,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293139394] [2021-06-05 15:23:09,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293139394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:09,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505766035] [2021-06-05 15:23:09,712 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:09,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 15:23:09,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:09,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505766035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:09,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:09,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 15:23:09,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034314154] [2021-06-05 15:23:09,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:23:09,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:09,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:23:09,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:23:09,885 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:10,291 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-06-05 15:23:10,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:23:10,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-06-05 15:23:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:10,293 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 15:23:10,293 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 15:23:10,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:23:10,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 15:23:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-06-05 15:23:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:10,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-06-05 15:23:10,301 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-06-05 15:23:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:10,302 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-06-05 15:23:10,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:10,302 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-06-05 15:23:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-05 15:23:10,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:10,303 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:10,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:10,517 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-06-05 15:23:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:10,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297718782] [2021-06-05 15:23:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:11,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:11,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297718782] [2021-06-05 15:23:11,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297718782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:11,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231921349] [2021-06-05 15:23:11,094 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:11,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:23:11,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:11,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:23:11,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231921349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:12,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:12,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-06-05 15:23:12,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982400165] [2021-06-05 15:23:12,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-05 15:23:12,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-05 15:23:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:23:12,352 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:30,917 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-06-05 15:23:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-06-05 15:23:30,918 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-05 15:23:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:30,921 INFO L225 Difference]: With dead ends: 6259 [2021-06-05 15:23:30,921 INFO L226 Difference]: Without dead ends: 5059 [2021-06-05 15:23:30,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 15640.5ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-06-05 15:23:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-06-05 15:23:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-06-05 15:23:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-06-05 15:23:30,945 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-06-05 15:23:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:30,945 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-06-05 15:23:30,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:30,945 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-06-05 15:23:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-05 15:23:30,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:30,946 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:31,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:23:31,146 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-06-05 15:23:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:31,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184471377] [2021-06-05 15:23:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:31,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:31,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184471377] [2021-06-05 15:23:31,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184471377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:31,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533392605] [2021-06-05 15:23:31,452 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:31,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-06-05 15:23:31,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:23:31,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:32,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533392605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:32,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:32,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-06-05 15:23:32,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196807922] [2021-06-05 15:23:32,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 15:23:32,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:32,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 15:23:32,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:23:32,603 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:47,144 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-06-05 15:23:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-06-05 15:23:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-05 15:23:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:47,147 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 15:23:47,147 INFO L226 Difference]: Without dead ends: 4225 [2021-06-05 15:23:47,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 13541.1ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-06-05 15:23:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-06-05 15:23:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-06-05 15:23:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-06-05 15:23:47,202 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-06-05 15:23:47,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:47,202 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-06-05 15:23:47,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-06-05 15:23:47,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 15:23:47,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:47,203 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:47,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:47,417 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:47,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-06-05 15:23:47,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:47,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65866072] [2021-06-05 15:23:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:47,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:47,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65866072] [2021-06-05 15:23:47,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65866072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:47,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057405031] [2021-06-05 15:23:47,666 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:47,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 15:23:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:47,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057405031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:47,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:47,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-06-05 15:23:47,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735729216] [2021-06-05 15:23:47,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:23:47,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:47,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:23:47,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:23:47,826 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 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 15:23:48,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:48,212 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-06-05 15:23:48,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:23:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 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 86 [2021-06-05 15:23:48,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:48,214 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 15:23:48,214 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 15:23:48,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:23:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 15:23:48,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-06-05 15:23:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-06-05 15:23:48,222 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-06-05 15:23:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:48,222 INFO L482 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-06-05 15:23:48,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 21 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 15:23:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-06-05 15:23:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-05 15:23:48,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:48,223 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:48,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:23:48,445 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-06-05 15:23:48,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:48,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680770394] [2021-06-05 15:23:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:49,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:49,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680770394] [2021-06-05 15:23:49,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680770394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:49,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710920065] [2021-06-05 15:23:49,143 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:49,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-05 15:23:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:49,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:23:49,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:50,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710920065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:50,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:50,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-06-05 15:23:50,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757067580] [2021-06-05 15:23:50,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-06-05 15:23:50,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-06-05 15:23:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:23:50,509 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:12,171 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-06-05 15:24:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-06-05 15:24:12,172 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-05 15:24:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:12,176 INFO L225 Difference]: With dead ends: 6876 [2021-06-05 15:24:12,176 INFO L226 Difference]: Without dead ends: 5550 [2021-06-05 15:24:12,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 18152.5ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-06-05 15:24:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-06-05 15:24:12,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-06-05 15:24:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-06-05 15:24:12,202 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-06-05 15:24:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:12,202 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-06-05 15:24:12,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-06-05 15:24:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-06-05 15:24:12,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:12,203 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:12,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:24:12,407 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:12,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:12,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-06-05 15:24:12,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:12,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614027557] [2021-06-05 15:24:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:12,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614027557] [2021-06-05 15:24:12,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614027557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:12,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429719802] [2021-06-05 15:24:12,711 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:12,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-06-05 15:24:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:24:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:13,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429719802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:13,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:13,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-06-05 15:24:13,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682982407] [2021-06-05 15:24:13,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 15:24:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:13,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 15:24:13,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:24:13,936 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:30,834 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-06-05 15:24:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-06-05 15:24:30,834 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-06-05 15:24:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:30,838 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 15:24:30,838 INFO L226 Difference]: Without dead ends: 4667 [2021-06-05 15:24:30,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 15612.5ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-06-05 15:24:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-06-05 15:24:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-06-05 15:24:30,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-06-05 15:24:30,868 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-06-05 15:24:30,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:30,869 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-06-05 15:24:30,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-06-05 15:24:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 15:24:30,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:30,870 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:31,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:31,085 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:31,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-06-05 15:24:31,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:31,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557510466] [2021-06-05 15:24:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:31,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:31,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557510466] [2021-06-05 15:24:31,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557510466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:31,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21033935] [2021-06-05 15:24:31,378 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 15:24:31,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:31,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21033935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:31,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:31,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 15:24:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100028751] [2021-06-05 15:24:31,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:24:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:24:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:24:31,561 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:32,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:32,033 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-06-05 15:24:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:24:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 15:24:32,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:32,035 INFO L225 Difference]: With dead ends: 1165 [2021-06-05 15:24:32,035 INFO L226 Difference]: Without dead ends: 1036 [2021-06-05 15:24:32,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:24:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-05 15:24:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-06-05 15:24:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-06-05 15:24:32,041 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-06-05 15:24:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:32,041 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-06-05 15:24:32,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-06-05 15:24:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-05 15:24:32,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:32,042 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:32,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:24:32,243 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-06-05 15:24:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:32,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276001696] [2021-06-05 15:24:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:32,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:32,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276001696] [2021-06-05 15:24:32,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276001696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:32,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425591426] [2021-06-05 15:24:32,949 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:32,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:24:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:34,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425591426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:34,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:34,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-06-05 15:24:34,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335560221] [2021-06-05 15:24:34,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-06-05 15:24:34,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:34,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-06-05 15:24:34,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:24:34,456 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:59,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:59,297 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-06-05 15:24:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-06-05 15:24:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-05 15:24:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:59,302 INFO L225 Difference]: With dead ends: 7521 [2021-06-05 15:24:59,302 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 15:24:59,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 20796.5ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-06-05 15:24:59,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 15:24:59,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-06-05 15:24:59,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-06-05 15:24:59,339 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-06-05 15:24:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:59,340 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-06-05 15:24:59,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-06-05 15:24:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-05 15:24:59,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:59,341 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:59,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:59,557 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:59,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:59,557 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-06-05 15:24:59,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:59,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465968055] [2021-06-05 15:24:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:59,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:59,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465968055] [2021-06-05 15:24:59,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465968055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:59,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369952273] [2021-06-05 15:24:59,981 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:00,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-05 15:25:00,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:00,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:01,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369952273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:01,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:01,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-06-05 15:25:01,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604565029] [2021-06-05 15:25:01,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 15:25:01,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:01,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 15:25:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:25:01,326 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:20,560 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-06-05 15:25:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-06-05 15:25:20,561 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-05 15:25:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:20,564 INFO L225 Difference]: With dead ends: 5135 [2021-06-05 15:25:20,564 INFO L226 Difference]: Without dead ends: 5131 [2021-06-05 15:25:20,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 17922.8ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-06-05 15:25:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-06-05 15:25:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-06-05 15:25:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-06-05 15:25:20,594 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-06-05 15:25:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:20,594 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-06-05 15:25:20,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-06-05 15:25:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-05 15:25:20,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:20,595 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:20,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:25:20,818 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-06-05 15:25:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:20,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826322089] [2021-06-05 15:25:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:21,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826322089] [2021-06-05 15:25:21,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826322089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665157902] [2021-06-05 15:25:21,135 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:21,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:25:21,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 83 conjunts are in the unsatisfiable core [2021-06-05 15:25:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:21,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665157902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:21,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:21,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 15:25:21,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955337854] [2021-06-05 15:25:21,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:25:21,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:25:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:25:21,326 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 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 15:25:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:21,861 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-06-05 15:25:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:25:21,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 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) Word has length 94 [2021-06-05 15:25:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:21,862 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 15:25:21,862 INFO L226 Difference]: Without dead ends: 1089 [2021-06-05 15:25:21,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:25:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-06-05 15:25:21,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-06-05 15:25:21,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-06-05 15:25:21,872 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-06-05 15:25:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:21,872 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-06-05 15:25:21,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 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 15:25:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-06-05 15:25:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:25:21,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:21,874 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:22,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:22,096 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-06-05 15:25:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:22,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487767325] [2021-06-05 15:25:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:22,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:22,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487767325] [2021-06-05 15:25:22,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487767325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:22,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456929052] [2021-06-05 15:25:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:22,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-05 15:25:22,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:22,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:25:22,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456929052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:24,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:24,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-06-05 15:25:24,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720560803] [2021-06-05 15:25:24,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-06-05 15:25:24,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:24,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-06-05 15:25:24,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:25:24,540 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:54,020 INFO L93 Difference]: Finished difference Result 8194 states and 16207 transitions. [2021-06-05 15:25:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-06-05 15:25:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 15:25:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:54,025 INFO L225 Difference]: With dead ends: 8194 [2021-06-05 15:25:54,025 INFO L226 Difference]: Without dead ends: 6598 [2021-06-05 15:25:54,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183369 ImplicationChecksByTransitivity, 23789.1ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-06-05 15:25:54,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-06-05 15:25:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 488. [2021-06-05 15:25:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.0677618069815193) internal successors, (1007), 487 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1007 transitions. [2021-06-05 15:25:54,055 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1007 transitions. Word has length 96 [2021-06-05 15:25:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:54,055 INFO L482 AbstractCegarLoop]: Abstraction has 488 states and 1007 transitions. [2021-06-05 15:25:54,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1007 transitions. [2021-06-05 15:25:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 15:25:54,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:54,056 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:54,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:25:54,257 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash -817968499, now seen corresponding path program 60 times [2021-06-05 15:25:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:54,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565018449] [2021-06-05 15:25:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:54,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:54,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565018449] [2021-06-05 15:25:54,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565018449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:54,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970542019] [2021-06-05 15:25:54,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:54,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-05 15:25:54,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:25:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:56,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970542019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:56,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:56,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-06-05 15:25:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289754710] [2021-06-05 15:25:56,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 15:25:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:56,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 15:25:56,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:25:56,057 INFO L87 Difference]: Start difference. First operand 488 states and 1007 transitions. Second operand has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:17,453 INFO L93 Difference]: Finished difference Result 5621 states and 11217 transitions. [2021-06-05 15:26:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-06-05 15:26:17,453 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 15:26:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:17,457 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 15:26:17,457 INFO L226 Difference]: Without dead ends: 5617 [2021-06-05 15:26:17,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178076 ImplicationChecksByTransitivity, 19803.8ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-06-05 15:26:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5617 states. [2021-06-05 15:26:17,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5617 to 408. [2021-06-05 15:26:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0835380835380835) internal successors, (848), 407 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 848 transitions. [2021-06-05 15:26:17,491 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 848 transitions. Word has length 96 [2021-06-05 15:26:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:17,491 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 848 transitions. [2021-06-05 15:26:17,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.63768115942029) internal successors, (182), 68 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 848 transitions. [2021-06-05 15:26:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-06-05 15:26:17,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:17,492 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:17,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:17,714 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:17,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1261330893, now seen corresponding path program 61 times [2021-06-05 15:26:17,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:17,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453286135] [2021-06-05 15:26:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:18,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:18,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453286135] [2021-06-05 15:26:18,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453286135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:18,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287168119] [2021-06-05 15:26:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-05 15:26:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:18,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287168119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:18,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:18,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 15:26:18,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661692838] [2021-06-05 15:26:18,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:26:18,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:18,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:26:18,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:26:18,176 INFO L87 Difference]: Start difference. First operand 408 states and 848 transitions. Second operand has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:18,701 INFO L93 Difference]: Finished difference Result 1283 states and 2532 transitions. [2021-06-05 15:26:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:26:18,701 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-06-05 15:26:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:18,702 INFO L225 Difference]: With dead ends: 1283 [2021-06-05 15:26:18,702 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 15:26:18,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:26:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 15:26:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 865. [2021-06-05 15:26:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.1597222222222223) internal successors, (1866), 864 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1866 transitions. [2021-06-05 15:26:18,711 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1866 transitions. Word has length 98 [2021-06-05 15:26:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:18,711 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 1866 transitions. [2021-06-05 15:26:18,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1866 transitions. [2021-06-05 15:26:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 15:26:18,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:18,712 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:18,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 15:26:18,935 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:18,936 INFO L82 PathProgramCache]: Analyzing trace with hash 2082950603, now seen corresponding path program 62 times [2021-06-05 15:26:18,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:18,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703895940] [2021-06-05 15:26:18,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:19,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703895940] [2021-06-05 15:26:19,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703895940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:19,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621189978] [2021-06-05 15:26:19,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:19,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:26:19,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:26:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:21,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621189978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:21,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:21,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-06-05 15:26:21,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606335481] [2021-06-05 15:26:21,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-06-05 15:26:21,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-06-05 15:26:21,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:26:21,437 INFO L87 Difference]: Start difference. First operand 865 states and 1866 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:53,499 INFO L93 Difference]: Finished difference Result 8895 states and 17601 transitions. [2021-06-05 15:26:53,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-06-05 15:26:53,500 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 15:26:53,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:53,506 INFO L225 Difference]: With dead ends: 8895 [2021-06-05 15:26:53,506 INFO L226 Difference]: Without dead ends: 7155 [2021-06-05 15:26:53,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218416 ImplicationChecksByTransitivity, 26383.5ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-06-05 15:26:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2021-06-05 15:26:53,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 510. [2021-06-05 15:26:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.068762278978389) internal successors, (1053), 509 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1053 transitions. [2021-06-05 15:26:53,548 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1053 transitions. Word has length 100 [2021-06-05 15:26:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:53,548 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1053 transitions. [2021-06-05 15:26:53,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1053 transitions. [2021-06-05 15:26:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 15:26:53,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:53,549 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:53,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:53,749 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:53,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash 894880397, now seen corresponding path program 63 times [2021-06-05 15:26:53,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:53,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952190915] [2021-06-05 15:26:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:54,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952190915] [2021-06-05 15:26:54,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952190915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878322364] [2021-06-05 15:26:54,266 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:54,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-06-05 15:26:54,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:54,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:26:54,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:56,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878322364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:56,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:56,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-06-05 15:26:56,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119696534] [2021-06-05 15:26:56,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-05 15:26:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-05 15:26:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:26:56,472 INFO L87 Difference]: Start difference. First operand 510 states and 1053 transitions. Second operand has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:22,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:22,204 INFO L93 Difference]: Finished difference Result 6129 states and 12233 transitions. [2021-06-05 15:27:22,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-06-05 15:27:22,204 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 15:27:22,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:22,208 INFO L225 Difference]: With dead ends: 6129 [2021-06-05 15:27:22,208 INFO L226 Difference]: Without dead ends: 6125 [2021-06-05 15:27:22,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211756 ImplicationChecksByTransitivity, 24343.2ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-06-05 15:27:22,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6125 states. [2021-06-05 15:27:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6125 to 426. [2021-06-05 15:27:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.084705882352941) internal successors, (886), 425 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 886 transitions. [2021-06-05 15:27:22,236 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 886 transitions. Word has length 100 [2021-06-05 15:27:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:22,236 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 886 transitions. [2021-06-05 15:27:22,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.638888888888889) internal successors, (190), 71 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 886 transitions. [2021-06-05 15:27:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-06-05 15:27:22,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:22,237 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:22,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:27:22,452 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash -661946999, now seen corresponding path program 64 times [2021-06-05 15:27:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:22,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460303082] [2021-06-05 15:27:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:22,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460303082] [2021-06-05 15:27:22,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460303082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218884966] [2021-06-05 15:27:22,769 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:22,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:27:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-05 15:27:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:22,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218884966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:22,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:22,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 15:27:22,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702052417] [2021-06-05 15:27:22,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:27:22,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:27:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:27:22,948 INFO L87 Difference]: Start difference. First operand 426 states and 886 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:23,507 INFO L93 Difference]: Finished difference Result 1342 states and 2649 transitions. [2021-06-05 15:27:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:27:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-06-05 15:27:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:23,509 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 15:27:23,509 INFO L226 Difference]: Without dead ends: 1195 [2021-06-05 15:27:23,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:27:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-06-05 15:27:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 905. [2021-06-05 15:27:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1603982300884956) internal successors, (1953), 904 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1953 transitions. [2021-06-05 15:27:23,516 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1953 transitions. Word has length 102 [2021-06-05 15:27:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:23,516 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1953 transitions. [2021-06-05 15:27:23,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1953 transitions. [2021-06-05 15:27:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-06-05 15:27:23,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:23,517 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:23,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:27:23,718 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:23,718 INFO L82 PathProgramCache]: Analyzing trace with hash -887997817, now seen corresponding path program 65 times [2021-06-05 15:27:23,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:23,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363819593] [2021-06-05 15:27:23,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:24,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:24,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363819593] [2021-06-05 15:27:24,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363819593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:24,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167286259] [2021-06-05 15:27:24,571 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:24,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-05 15:27:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:24,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:27:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:26,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167286259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:26,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:26,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-06-05 15:27:26,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288482008] [2021-06-05 15:27:26,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-06-05 15:27:26,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-06-05 15:27:26,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 15:27:26,402 INFO L87 Difference]: Start difference. First operand 905 states and 1953 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:03,309 INFO L93 Difference]: Finished difference Result 9624 states and 19051 transitions. [2021-06-05 15:28:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-06-05 15:28:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-06-05 15:28:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:03,316 INFO L225 Difference]: With dead ends: 9624 [2021-06-05 15:28:03,316 INFO L226 Difference]: Without dead ends: 7734 [2021-06-05 15:28:03,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258282 ImplicationChecksByTransitivity, 29562.3ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-06-05 15:28:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2021-06-05 15:28:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 532. [2021-06-05 15:28:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0696798493408664) internal successors, (1099), 531 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1099 transitions. [2021-06-05 15:28:03,358 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1099 transitions. Word has length 104 [2021-06-05 15:28:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:03,358 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1099 transitions. [2021-06-05 15:28:03,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:03,359 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1099 transitions. [2021-06-05 15:28:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-06-05 15:28:03,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:03,360 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:03,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:28:03,561 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash 922524557, now seen corresponding path program 66 times [2021-06-05 15:28:03,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:03,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741596900] [2021-06-05 15:28:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:03,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:03,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741596900] [2021-06-05 15:28:03,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741596900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:03,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536901362] [2021-06-05 15:28:03,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:03,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-06-05 15:28:03,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:03,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:28:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:05,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536901362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:05,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:05,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-06-05 15:28:05,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48463071] [2021-06-05 15:28:05,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-05 15:28:05,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:05,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-05 15:28:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:28:05,639 INFO L87 Difference]: Start difference. First operand 532 states and 1099 transitions. Second operand has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:32,866 INFO L93 Difference]: Finished difference Result 6659 states and 13293 transitions. [2021-06-05 15:28:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-06-05 15:28:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-06-05 15:28:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:32,871 INFO L225 Difference]: With dead ends: 6659 [2021-06-05 15:28:32,871 INFO L226 Difference]: Without dead ends: 6655 [2021-06-05 15:28:32,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250006 ImplicationChecksByTransitivity, 25229.6ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-06-05 15:28:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6655 states. [2021-06-05 15:28:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6655 to 444. [2021-06-05 15:28:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0857787810383748) internal successors, (924), 443 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:32,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 924 transitions. [2021-06-05 15:28:32,906 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 924 transitions. Word has length 104 [2021-06-05 15:28:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:32,906 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 924 transitions. [2021-06-05 15:28:32,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.64) internal successors, (198), 74 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 924 transitions. [2021-06-05 15:28:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-06-05 15:28:32,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:32,907 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:33,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:33,109 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:33,110 INFO L82 PathProgramCache]: Analyzing trace with hash 409873221, now seen corresponding path program 67 times [2021-06-05 15:28:33,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:33,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989077270] [2021-06-05 15:28:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:33,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:33,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989077270] [2021-06-05 15:28:33,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989077270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:33,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375924695] [2021-06-05 15:28:33,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-05 15:28:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:33,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375924695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:33,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:33,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 15:28:33,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214113765] [2021-06-05 15:28:33,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:28:33,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:33,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:28:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:28:33,643 INFO L87 Difference]: Start difference. First operand 444 states and 924 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:34,261 INFO L93 Difference]: Finished difference Result 1401 states and 2766 transitions. [2021-06-05 15:28:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:28:34,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-06-05 15:28:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:34,262 INFO L225 Difference]: With dead ends: 1401 [2021-06-05 15:28:34,262 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 15:28:34,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:28:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 15:28:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 945. [2021-06-05 15:28:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 2.1610169491525424) internal successors, (2040), 944 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:34,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 2040 transitions. [2021-06-05 15:28:34,271 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 2040 transitions. Word has length 106 [2021-06-05 15:28:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:34,271 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 2040 transitions. [2021-06-05 15:28:34,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 2040 transitions. [2021-06-05 15:28:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-06-05 15:28:34,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:34,272 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:34,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:28:34,472 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1087227581, now seen corresponding path program 68 times [2021-06-05 15:28:34,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:34,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411047305] [2021-06-05 15:28:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:35,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:35,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411047305] [2021-06-05 15:28:35,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411047305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:35,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662313817] [2021-06-05 15:28:35,433 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:35,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:35,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:28:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:37,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662313817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:37,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:37,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-06-05 15:28:37,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146418906] [2021-06-05 15:28:37,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-06-05 15:28:37,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-06-05 15:28:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 15:28:37,443 INFO L87 Difference]: Start difference. First operand 945 states and 2040 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:20,455 INFO L93 Difference]: Finished difference Result 10381 states and 20557 transitions. [2021-06-05 15:29:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-06-05 15:29:20,456 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-06-05 15:29:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:20,462 INFO L225 Difference]: With dead ends: 10381 [2021-06-05 15:29:20,463 INFO L226 Difference]: Without dead ends: 8335 [2021-06-05 15:29:20,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303391 ImplicationChecksByTransitivity, 33081.5ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-06-05 15:29:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8335 states. [2021-06-05 15:29:20,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8335 to 554. [2021-06-05 15:29:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0705244122965643) internal successors, (1145), 553 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:20,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1145 transitions. [2021-06-05 15:29:20,509 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1145 transitions. Word has length 108 [2021-06-05 15:29:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:20,509 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1145 transitions. [2021-06-05 15:29:20,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1145 transitions. [2021-06-05 15:29:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-06-05 15:29:20,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:20,510 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:20,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:20,711 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash 447708557, now seen corresponding path program 69 times [2021-06-05 15:29:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:20,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189812620] [2021-06-05 15:29:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:21,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189812620] [2021-06-05 15:29:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189812620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989949256] [2021-06-05 15:29:21,104 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:21,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-06-05 15:29:21,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:21,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:29:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:23,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989949256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:23,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:23,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-06-05 15:29:23,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269595558] [2021-06-05 15:29:23,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-05 15:29:23,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:23,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-05 15:29:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:29:23,017 INFO L87 Difference]: Start difference. First operand 554 states and 1145 transitions. Second operand has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:35,397 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-05 15:29:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:53,760 INFO L93 Difference]: Finished difference Result 7211 states and 14397 transitions. [2021-06-05 15:29:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-06-05 15:29:53,761 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-06-05 15:29:53,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:53,767 INFO L225 Difference]: With dead ends: 7211 [2021-06-05 15:29:53,767 INFO L226 Difference]: Without dead ends: 7207 [2021-06-05 15:29:53,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 831 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293222 ImplicationChecksByTransitivity, 28432.1ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-06-05 15:29:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2021-06-05 15:29:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 462. [2021-06-05 15:29:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0867678958785247) internal successors, (962), 461 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 962 transitions. [2021-06-05 15:29:53,809 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 962 transitions. Word has length 108 [2021-06-05 15:29:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:53,809 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 962 transitions. [2021-06-05 15:29:53,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.641025641025641) internal successors, (206), 77 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 962 transitions. [2021-06-05 15:29:53,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 15:29:53,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:53,809 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:54,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 15:29:54,010 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:54,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2071368959, now seen corresponding path program 70 times [2021-06-05 15:29:54,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:54,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31241161] [2021-06-05 15:29:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:54,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:54,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31241161] [2021-06-05 15:29:54,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31241161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780660877] [2021-06-05 15:29:54,396 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:54,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:54,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-05 15:29:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:54,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780660877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:54,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-06-05 15:29:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074682412] [2021-06-05 15:29:54,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:29:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:29:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:29:54,618 INFO L87 Difference]: Start difference. First operand 462 states and 962 transitions. Second operand has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:55,323 INFO L93 Difference]: Finished difference Result 1460 states and 2883 transitions. [2021-06-05 15:29:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:29:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 15:29:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:55,325 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 15:29:55,325 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 15:29:55,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:29:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 15:29:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 985. [2021-06-05 15:29:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.1615853658536586) internal successors, (2127), 984 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2127 transitions. [2021-06-05 15:29:55,333 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2127 transitions. Word has length 110 [2021-06-05 15:29:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:55,333 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 2127 transitions. [2021-06-05 15:29:55,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.074074074074074) internal successors, (110), 27 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2127 transitions. [2021-06-05 15:29:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-06-05 15:29:55,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:55,335 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:55,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:55,535 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:55,535 INFO L82 PathProgramCache]: Analyzing trace with hash -293975553, now seen corresponding path program 71 times [2021-06-05 15:29:55,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:55,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183774155] [2021-06-05 15:29:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:56,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:56,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183774155] [2021-06-05 15:29:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183774155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:56,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770574798] [2021-06-05 15:29:56,561 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:56,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-06-05 15:29:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:56,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:29:56,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:58,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770574798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:58,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:58,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-06-05 15:29:58,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975265538] [2021-06-05 15:29:58,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-06-05 15:29:58,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:58,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-06-05 15:29:58,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 15:29:58,727 INFO L87 Difference]: Start difference. First operand 985 states and 2127 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:48,042 INFO L93 Difference]: Finished difference Result 11166 states and 22119 transitions. [2021-06-05 15:30:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-06-05 15:30:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-06-05 15:30:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:48,048 INFO L225 Difference]: With dead ends: 11166 [2021-06-05 15:30:48,048 INFO L226 Difference]: Without dead ends: 8958 [2021-06-05 15:30:48,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354186 ImplicationChecksByTransitivity, 37194.3ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-06-05 15:30:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2021-06-05 15:30:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 576. [2021-06-05 15:30:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:48,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-06-05 15:30:48,099 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 112 [2021-06-05 15:30:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:48,100 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-06-05 15:30:48,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-06-05 15:30:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-06-05 15:30:48,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:48,100 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:48,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:48,301 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1604407155, now seen corresponding path program 72 times [2021-06-05 15:30:48,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:48,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418038238] [2021-06-05 15:30:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:48,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:48,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418038238] [2021-06-05 15:30:48,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418038238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:48,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721343574] [2021-06-05 15:30:48,743 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:48,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-06-05 15:30:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:48,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:30:48,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:50,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721343574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:50,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:50,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-06-05 15:30:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188180473] [2021-06-05 15:30:50,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-06-05 15:30:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-06-05 15:30:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:30:50,731 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:04,463 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-06-05 15:31:14,561 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-05 15:31:24,708 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-06-05 15:31:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:25,223 INFO L93 Difference]: Finished difference Result 7785 states and 15545 transitions. [2021-06-05 15:31:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-06-05 15:31:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-06-05 15:31:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:25,229 INFO L225 Difference]: With dead ends: 7785 [2021-06-05 15:31:25,229 INFO L226 Difference]: Without dead ends: 7781 [2021-06-05 15:31:25,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341817 ImplicationChecksByTransitivity, 31503.2ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-06-05 15:31:25,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-06-05 15:31:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 480. [2021-06-05 15:31:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.0876826722338206) internal successors, (1000), 479 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1000 transitions. [2021-06-05 15:31:25,271 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1000 transitions. Word has length 112 [2021-06-05 15:31:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:25,271 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1000 transitions. [2021-06-05 15:31:25,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6419753086419755) internal successors, (214), 80 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1000 transitions. [2021-06-05 15:31:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-06-05 15:31:25,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:25,272 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:25,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:25,473 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash 34618557, now seen corresponding path program 73 times [2021-06-05 15:31:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:25,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889192206] [2021-06-05 15:31:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:25,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:25,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889192206] [2021-06-05 15:31:25,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889192206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:25,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10546829] [2021-06-05 15:31:25,847 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:25,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-05 15:31:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:26,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10546829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:26,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:26,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-05 15:31:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525432696] [2021-06-05 15:31:26,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:31:26,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:26,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:31:26,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:31:26,040 INFO L87 Difference]: Start difference. First operand 480 states and 1000 transitions. Second operand has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:26,793 INFO L93 Difference]: Finished difference Result 1519 states and 3000 transitions. [2021-06-05 15:31:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:31:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-06-05 15:31:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:26,794 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 15:31:26,794 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 15:31:26,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:31:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 15:31:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1025. [2021-06-05 15:31:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 2.162109375) internal successors, (2214), 1024 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 2214 transitions. [2021-06-05 15:31:26,802 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 2214 transitions. Word has length 114 [2021-06-05 15:31:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:26,803 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 2214 transitions. [2021-06-05 15:31:26,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.071428571428571) internal successors, (114), 28 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 2214 transitions. [2021-06-05 15:31:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-06-05 15:31:26,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:26,804 INFO L521 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:27,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 15:31:27,004 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash 979201211, now seen corresponding path program 74 times [2021-06-05 15:31:27,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:27,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482148791] [2021-06-05 15:31:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:28,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:28,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482148791] [2021-06-05 15:31:28,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482148791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:28,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027023400] [2021-06-05 15:31:28,052 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:28,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:31:28,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:28,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:31:28,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:30,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027023400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:30,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:30,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-06-05 15:31:30,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315603469] [2021-06-05 15:31:30,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-06-05 15:31:30,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:30,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-06-05 15:31:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 15:31:30,398 INFO L87 Difference]: Start difference. First operand 1025 states and 2214 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:31:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 475 states. [2021-06-05 15:31:58,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:58,987 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:31:58,988 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:31:58,990 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:31:58,990 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:31:58 BasicIcfg [2021-06-05 15:31:58,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:31:58,990 INFO L168 Benchmark]: Toolchain (without parser) took 731048.70 ms. Allocated memory was 364.9 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 344.5 MB in the beginning and 960.3 MB in the end (delta: -615.8 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 15:31:58,990 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 364.9 MB. Free memory was 345.6 MB in the beginning and 345.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:31:58,991 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.37 ms. Allocated memory is still 364.9 MB. Free memory was 344.4 MB in the beginning and 343.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:31:58,991 INFO L168 Benchmark]: Boogie Preprocessor took 11.90 ms. Allocated memory is still 364.9 MB. Free memory was 343.0 MB in the beginning and 342.1 MB in the end (delta: 915.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:31:58,991 INFO L168 Benchmark]: RCFGBuilder took 242.70 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 330.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 15:31:58,991 INFO L168 Benchmark]: TraceAbstraction took 730766.85 ms. Allocated memory was 364.9 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 330.1 MB in the beginning and 960.3 MB in the end (delta: -630.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 15:31:58,991 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 364.9 MB. Free memory was 345.6 MB in the beginning and 345.5 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.37 ms. Allocated memory is still 364.9 MB. Free memory was 344.4 MB in the beginning and 343.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.90 ms. Allocated memory is still 364.9 MB. Free memory was 343.0 MB in the beginning and 342.1 MB in the end (delta: 915.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 242.70 ms. Allocated memory is still 364.9 MB. Free memory was 342.0 MB in the beginning and 330.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 730766.85 ms. Allocated memory was 364.9 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 330.1 MB in the beginning and 960.3 MB in the end (delta: -630.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: 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 (1025states) and FLOYD_HOARE automaton (currently 475 states, 110 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 581 known predicates. - TimeoutResultAtElement [Line: 45]: 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 (1025states) and FLOYD_HOARE automaton (currently 475 states, 110 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 581 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1025states) and FLOYD_HOARE automaton (currently 475 states, 110 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 581 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 730652.6ms, OverallIterations: 77, TraceHistogramMax: 26, EmptinessCheckTime: 81.3ms, AutomataDifference: 640408.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6804 SDtfs, 49282 SDslu, 127238 SDs, 0 SdLazy, 132870 SolverSat, 6222 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 60511.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21278 GetRequests, 4153 SyntacticMatches, 50 SemanticMatches, 17074 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4204739 ImplicationChecksByTransitivity, 550717.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1025occurred in iteration=76, InterpolantAutomatonStates: 14274, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 876.5ms AutomataMinimizationTime, 76 MinimizatonAttempts, 150437 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 433.5ms SsaConstructionTime, 2035.0ms SatisfiabilityAnalysisTime, 68932.5ms InterpolantComputationTime, 9930 NumberOfCodeBlocks, 9930 NumberOfCodeBlocksAsserted, 704 NumberOfCheckSat, 9778 ConstructedInterpolants, 0 QuantifiedInterpolants, 71198 SizeOfPredicates, 225 NumberOfNonLiveVariables, 12800 ConjunctsInSsa, 2875 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 21499/66401 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