/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 11:53:53,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 11:53:53,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 11:53:53,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 11:53:53,615 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 11:53:53,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 11:53:53,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 11:53:53,630 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 11:53:53,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 11:53:53,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 11:53:53,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 11:53:53,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 11:53:53,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 11:53:53,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 11:53:53,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 11:53:53,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:53:53,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 11:53:53,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 11:53:53,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 11:53:53,639 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 11:53:53,639 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 11:53:53,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 11:53:53,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 11:53:53,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 11:53:53,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 11:53:53,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 11:53:53,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 11:53:53,871 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 11:53:53,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-18 11:53:53,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e974e5a/5f93c874d618446fa9c5cf4b0ecf59f5/FLAGb9787a7cd [2022-03-18 11:53:54,404 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 11:53:54,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c [2022-03-18 11:53:54,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e974e5a/5f93c874d618446fa9c5cf4b0ecf59f5/FLAGb9787a7cd [2022-03-18 11:53:54,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e974e5a/5f93c874d618446fa9c5cf4b0ecf59f5 [2022-03-18 11:53:54,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 11:53:54,840 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 11:53:54,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 11:53:54,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 11:53:54,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 11:53:54,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:53:54" (1/1) ... [2022-03-18 11:53:54,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5037669f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:54, skipping insertion in model container [2022-03-18 11:53:54,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:53:54" (1/1) ... [2022-03-18 11:53:54,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 11:53:54,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 11:53:54,984 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c[373,386] [2022-03-18 11:53:55,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:53:55,029 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 11:53:55,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_1-2.c[373,386] [2022-03-18 11:53:55,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:53:55,045 INFO L208 MainTranslator]: Completed translation [2022-03-18 11:53:55,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55 WrapperNode [2022-03-18 11:53:55,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 11:53:55,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 11:53:55,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 11:53:55,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 11:53:55,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 11:53:55,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 11:53:55,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 11:53:55,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 11:53:55,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (1/1) ... [2022-03-18 11:53:55,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:53:55,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:55,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 11:53:55,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 11:53:55,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 11:53:55,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 11:53:55,134 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 11:53:55,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 11:53:55,135 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 11:53:55,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 11:53:55,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 11:53:55,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 11:53:55,185 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 11:53:55,187 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 11:53:55,297 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 11:53:55,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 11:53:55,300 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 11:53:55,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:53:55 BoogieIcfgContainer [2022-03-18 11:53:55,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 11:53:55,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 11:53:55,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 11:53:55,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 11:53:55,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:53:54" (1/3) ... [2022-03-18 11:53:55,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a81352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:53:55, skipping insertion in model container [2022-03-18 11:53:55,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:53:55" (2/3) ... [2022-03-18 11:53:55,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a81352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:53:55, skipping insertion in model container [2022-03-18 11:53:55,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:53:55" (3/3) ... [2022-03-18 11:53:55,309 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2022-03-18 11:53:55,312 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 11:53:55,312 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 11:53:55,340 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 11:53:55,344 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 11:53:55,344 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 11:53:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 11:53:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 11:53:55,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:55,356 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:55,356 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:55,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1418018830, now seen corresponding path program 1 times [2022-03-18 11:53:55,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:55,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033507371] [2022-03-18 11:53:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:55,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:55,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033507371] [2022-03-18 11:53:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033507371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:53:55,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:53:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 11:53:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307630565] [2022-03-18 11:53:55,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:53:55,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 11:53:55,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:55,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 11:53:55,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:53:55,490 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:55,532 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-18 11:53:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 11:53:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 11:53:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:55,537 INFO L225 Difference]: With dead ends: 30 [2022-03-18 11:53:55,538 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 11:53:55,540 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:53:55,544 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:55,545 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:53:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 11:53:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 11:53:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 11:53:55,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 11:53:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:55,578 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 11:53:55,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 11:53:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 11:53:55,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:55,579 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:55,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 11:53:55,579 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:55,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:55,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1427254040, now seen corresponding path program 1 times [2022-03-18 11:53:55,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:55,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782864387] [2022-03-18 11:53:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:55,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782864387] [2022-03-18 11:53:55,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782864387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:53:55,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:53:55,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:53:55,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140655850] [2022-03-18 11:53:55,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:53:55,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:53:55,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:55,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:53:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:53:55,688 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:55,717 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-18 11:53:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:53:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 11:53:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:55,719 INFO L225 Difference]: With dead ends: 20 [2022-03-18 11:53:55,719 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 11:53:55,720 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:53:55,720 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:55,721 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:53:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 11:53:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-18 11:53:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-18 11:53:55,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-18 11:53:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:55,724 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-18 11:53:55,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-18 11:53:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 11:53:55,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:55,725 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:55,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 11:53:55,726 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:55,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash -397340509, now seen corresponding path program 1 times [2022-03-18 11:53:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:55,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032579827] [2022-03-18 11:53:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:55,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:55,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032579827] [2022-03-18 11:53:55,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032579827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:53:55,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434693564] [2022-03-18 11:53:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:55,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:55,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:55,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:53:55,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 11:53:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 11:53:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:53:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:55,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:53:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:55,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434693564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:53:55,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:53:55,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 11:53:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895632383] [2022-03-18 11:53:55,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:53:55,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 11:53:55,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 11:53:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-18 11:53:55,909 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:55,991 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-03-18 11:53:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 11:53:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 11:53:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:55,992 INFO L225 Difference]: With dead ends: 27 [2022-03-18 11:53:55,992 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 11:53:55,992 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-03-18 11:53:55,993 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:55,994 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:53:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 11:53:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-03-18 11:53:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-18 11:53:55,998 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2022-03-18 11:53:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:55,998 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-18 11:53:55,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-18 11:53:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 11:53:55,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:55,999 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:56,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 11:53:56,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:56,215 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1838845100, now seen corresponding path program 2 times [2022-03-18 11:53:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372981569] [2022-03-18 11:53:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:56,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372981569] [2022-03-18 11:53:56,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372981569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:53:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978021857] [2022-03-18 11:53:56,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:53:56,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:56,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:56,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:53:56,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 11:53:56,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:53:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:53:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 11:53:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:53:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:56,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:53:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:56,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978021857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:53:56,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:53:56,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 11:53:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327037943] [2022-03-18 11:53:56,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:53:56,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 11:53:56,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 11:53:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-18 11:53:56,636 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:56,956 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-03-18 11:53:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 11:53:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 11:53:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:56,957 INFO L225 Difference]: With dead ends: 48 [2022-03-18 11:53:56,957 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 11:53:56,958 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2022-03-18 11:53:56,959 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:56,959 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 43 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:53:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 11:53:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2022-03-18 11:53:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:56,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-03-18 11:53:56,965 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 19 [2022-03-18 11:53:56,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:56,965 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-03-18 11:53:56,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-03-18 11:53:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 11:53:56,966 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:56,966 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:56,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 11:53:57,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 11:53:57,183 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:57,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1976334073, now seen corresponding path program 1 times [2022-03-18 11:53:57,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:57,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894299637] [2022-03-18 11:53:57,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 11:53:57,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:57,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894299637] [2022-03-18 11:53:57,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894299637] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:53:57,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:53:57,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:53:57,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555368388] [2022-03-18 11:53:57,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:53:57,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:53:57,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:57,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:53:57,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:53:57,218 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:57,242 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2022-03-18 11:53:57,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:53:57,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 11:53:57,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:57,243 INFO L225 Difference]: With dead ends: 62 [2022-03-18 11:53:57,243 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 11:53:57,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:53:57,244 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:57,245 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:53:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 11:53:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-18 11:53:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-03-18 11:53:57,252 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2022-03-18 11:53:57,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:57,252 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-03-18 11:53:57,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:57,252 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-03-18 11:53:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 11:53:57,253 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:57,253 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:57,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 11:53:57,253 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:57,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:57,254 INFO L85 PathProgramCache]: Analyzing trace with hash 942801427, now seen corresponding path program 1 times [2022-03-18 11:53:57,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:57,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902591208] [2022-03-18 11:53:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:57,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:57,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:57,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902591208] [2022-03-18 11:53:57,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902591208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:53:57,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620787077] [2022-03-18 11:53:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:57,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:57,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:57,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:53:57,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 11:53:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 11:53:57,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:53:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:57,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:53:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:57,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620787077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:53:57,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:53:57,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 11:53:57,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261365769] [2022-03-18 11:53:57,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:53:57,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 11:53:57,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 11:53:57,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-18 11:53:57,620 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:53:58,667 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2022-03-18 11:53:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 11:53:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-18 11:53:58,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:53:58,668 INFO L225 Difference]: With dead ends: 125 [2022-03-18 11:53:58,669 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 11:53:58,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=373, Invalid=887, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 11:53:58,670 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:53:58,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 53 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 11:53:58,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 11:53:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 63. [2022-03-18 11:53:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-03-18 11:53:58,693 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 25 [2022-03-18 11:53:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:53:58,693 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-03-18 11:53:58,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:53:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-03-18 11:53:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 11:53:58,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:53:58,694 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:53:58,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 11:53:58,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:58,913 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:53:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:53:58,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1350577782, now seen corresponding path program 3 times [2022-03-18 11:53:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:53:58,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017237013] [2022-03-18 11:53:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:53:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:53:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:59,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:53:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:53:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:53:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017237013] [2022-03-18 11:53:59,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017237013] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:53:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388087348] [2022-03-18 11:53:59,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 11:53:59,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:53:59,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:53:59,088 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:53:59,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 11:53:59,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-18 11:53:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:53:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 11:53:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:53:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:59,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:53:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:53:59,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388087348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:53:59,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:53:59,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 11:53:59,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952175223] [2022-03-18 11:53:59,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:53:59,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 11:53:59,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:53:59,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 11:53:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-03-18 11:53:59,494 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:54:02,669 INFO L93 Difference]: Finished difference Result 207 states and 253 transitions. [2022-03-18 11:54:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 11:54:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-18 11:54:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:54:02,670 INFO L225 Difference]: With dead ends: 207 [2022-03-18 11:54:02,670 INFO L226 Difference]: Without dead ends: 202 [2022-03-18 11:54:02,671 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 11:54:02,672 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 11:54:02,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 78 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 11:54:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-18 11:54:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 87. [2022-03-18 11:54:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 82 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-03-18 11:54:02,705 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 31 [2022-03-18 11:54:02,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:54:02,705 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-03-18 11:54:02,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-03-18 11:54:02,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 11:54:02,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:54:02,712 INFO L500 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:54:02,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 11:54:02,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:54:02,913 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:54:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:54:02,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1438159625, now seen corresponding path program 2 times [2022-03-18 11:54:02,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:54:02,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322607885] [2022-03-18 11:54:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:54:02,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:54:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:02,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:54:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-03-18 11:54:02,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:54:02,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322607885] [2022-03-18 11:54:02,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322607885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:54:02,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:54:02,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:54:02,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273068681] [2022-03-18 11:54:02,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:54:02,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:54:02,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:54:02,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:54:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:54:02,958 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:54:02,989 INFO L93 Difference]: Finished difference Result 120 states and 143 transitions. [2022-03-18 11:54:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 11:54:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 11:54:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:54:02,992 INFO L225 Difference]: With dead ends: 120 [2022-03-18 11:54:02,992 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 11:54:02,993 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:54:02,993 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:54:02,993 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:54:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 11:54:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-03-18 11:54:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:03,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-03-18 11:54:03,012 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 41 [2022-03-18 11:54:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:54:03,013 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-03-18 11:54:03,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-03-18 11:54:03,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 11:54:03,013 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:54:03,013 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:54:03,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 11:54:03,014 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:54:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:54:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 293418680, now seen corresponding path program 2 times [2022-03-18 11:54:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:54:03,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074938343] [2022-03-18 11:54:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:54:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:54:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:54:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:03,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:54:03,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074938343] [2022-03-18 11:54:03,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074938343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:54:03,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448985490] [2022-03-18 11:54:03,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:54:03,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:54:03,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:54:03,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:54:03,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 11:54:03,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:54:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:54:03,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 11:54:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:54:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:03,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:54:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 11:54:04,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448985490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:54:04,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:54:04,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 7] total 41 [2022-03-18 11:54:04,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079464160] [2022-03-18 11:54:04,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:54:04,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 11:54:04,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:54:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 11:54:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 11:54:04,072 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 39 states have internal predecessors, (82), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:54:04,935 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-03-18 11:54:04,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 11:54:04,935 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 39 states have internal predecessors, (82), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 11:54:04,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:54:04,936 INFO L225 Difference]: With dead ends: 101 [2022-03-18 11:54:04,936 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 11:54:04,938 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=402, Invalid=4568, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 11:54:04,938 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 11:54:04,938 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 59 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 11:54:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 11:54:04,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-03-18 11:54:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-03-18 11:54:04,955 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 43 [2022-03-18 11:54:04,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:54:04,958 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-03-18 11:54:04,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 39 states have internal predecessors, (82), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:04,958 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-03-18 11:54:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 11:54:04,960 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:54:04,960 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:54:04,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 11:54:05,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:54:05,177 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:54:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:54:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash -450523851, now seen corresponding path program 3 times [2022-03-18 11:54:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:54:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993310446] [2022-03-18 11:54:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:54:05,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:54:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:05,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:54:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:05,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:54:05,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993310446] [2022-03-18 11:54:05,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993310446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:54:05,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634218336] [2022-03-18 11:54:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 11:54:05,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:54:05,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:54:05,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:54:05,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 11:54:05,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-03-18 11:54:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:54:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 11:54:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:54:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:05,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:54:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:06,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634218336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:54:06,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:54:06,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-18 11:54:06,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825161032] [2022-03-18 11:54:06,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:54:06,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 11:54:06,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:54:06,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 11:54:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 11:54:06,496 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:54:29,113 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-03-18 11:54:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 11:54:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-18 11:54:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:54:29,114 INFO L225 Difference]: With dead ends: 134 [2022-03-18 11:54:29,114 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 11:54:29,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=1553, Invalid=4147, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 11:54:29,116 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 11:54:29,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 108 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 11:54:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 11:54:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-18 11:54:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:29,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-03-18 11:54:29,137 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 45 [2022-03-18 11:54:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:54:29,138 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-03-18 11:54:29,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:54:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-03-18 11:54:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 11:54:29,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:54:29,138 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:54:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 11:54:29,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:54:29,343 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:54:29,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:54:29,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2121974854, now seen corresponding path program 4 times [2022-03-18 11:54:29,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:54:29,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238745118] [2022-03-18 11:54:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:54:29,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:54:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:54:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:54:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:29,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:54:29,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238745118] [2022-03-18 11:54:29,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238745118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:54:29,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194494123] [2022-03-18 11:54:29,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 11:54:29,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:54:29,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:54:29,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:54:29,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 11:54:29,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 11:54:29,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:54:29,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 11:54:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:54:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:29,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:54:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:54:30,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194494123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:54:30,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:54:30,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 11:54:30,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955577134] [2022-03-18 11:54:30,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:54:30,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 11:54:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:54:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 11:54:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=1778, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 11:54:30,780 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:55:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:55:47,841 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2022-03-18 11:55:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 11:55:47,842 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-18 11:55:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:55:47,843 INFO L225 Difference]: With dead ends: 182 [2022-03-18 11:55:47,843 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 11:55:47,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=2516, Invalid=6796, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 11:55:47,845 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:55:47,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 128 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 11:55:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 11:55:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-18 11:55:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:55:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-03-18 11:55:47,860 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 55 [2022-03-18 11:55:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:55:47,860 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-03-18 11:55:47,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:55:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-03-18 11:55:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 11:55:47,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:55:47,861 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:55:47,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 11:55:48,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:55:48,069 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:55:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:55:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1992848505, now seen corresponding path program 4 times [2022-03-18 11:55:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:55:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175877414] [2022-03-18 11:55:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:55:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:55:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:55:48,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:55:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:55:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:55:48,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:55:48,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175877414] [2022-03-18 11:55:48,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175877414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:55:48,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45841896] [2022-03-18 11:55:48,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 11:55:48,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:55:48,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:55:48,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:55:48,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 11:55:48,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 11:55:48,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:55:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 11:55:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:55:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:55:49,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:55:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:55:51,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45841896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:55:51,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:55:51,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-18 11:55:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100342692] [2022-03-18 11:55:51,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:55:51,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 11:55:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:55:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 11:55:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1677, Invalid=4643, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 11:55:51,240 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:04:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:04:13,203 INFO L93 Difference]: Finished difference Result 262 states and 283 transitions. [2022-03-18 12:04:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 12:04:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-18 12:04:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:04:13,205 INFO L225 Difference]: With dead ends: 262 [2022-03-18 12:04:13,205 INFO L226 Difference]: Without dead ends: 257 [2022-03-18 12:04:13,209 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3349 ImplicationChecksByTransitivity, 502.0s TimeCoverageRelationStatistics Valid=6299, Invalid=17866, Unknown=15, NotChecked=0, Total=24180 [2022-03-18 12:04:13,209 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 110 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3948 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 3948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 12:04:13,209 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 208 Invalid, 4738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 3948 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 12:04:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-18 12:04:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-03-18 12:04:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:04:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2022-03-18 12:04:13,242 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 85 [2022-03-18 12:04:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:04:13,242 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2022-03-18 12:04:13,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:04:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2022-03-18 12:04:13,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 12:04:13,245 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:04:13,245 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:04:13,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 12:04:13,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 12:04:13,451 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:04:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:04:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash -726945214, now seen corresponding path program 5 times [2022-03-18 12:04:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:04:13,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726282847] [2022-03-18 12:04:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:04:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:04:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:04:14,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 12:04:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 12:04:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:04:14,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 12:04:14,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726282847] [2022-03-18 12:04:14,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726282847] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 12:04:14,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806187910] [2022-03-18 12:04:14,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 12:04:14,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 12:04:14,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 12:04:14,534 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 12:04:14,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 12:05:25,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-18 12:05:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 12:05:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 12:05:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 12:05:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:05:25,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 12:05:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 12:05:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806187910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 12:05:28,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 12:05:28,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-18 12:05:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696783273] [2022-03-18 12:05:28,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 12:05:28,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 12:05:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 12:05:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 12:05:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1507, Invalid=7999, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 12:05:28,011 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:07:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 12:07:27,607 INFO L93 Difference]: Finished difference Result 270 states and 275 transitions. [2022-03-18 12:07:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 12:07:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-18 12:07:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 12:07:27,609 INFO L225 Difference]: With dead ends: 270 [2022-03-18 12:07:27,609 INFO L226 Difference]: Without dead ends: 265 [2022-03-18 12:07:27,618 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6581 ImplicationChecksByTransitivity, 120.1s TimeCoverageRelationStatistics Valid=6662, Invalid=30010, Unknown=0, NotChecked=0, Total=36672 [2022-03-18 12:07:27,619 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 4925 mSolverCounterSat, 1323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 6248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 4925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-18 12:07:27,619 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 278 Invalid, 6248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 4925 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-18 12:07:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-03-18 12:07:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-03-18 12:07:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0115384615384615) internal successors, (263), 260 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:07:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2022-03-18 12:07:27,638 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 103 [2022-03-18 12:07:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 12:07:27,638 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2022-03-18 12:07:27,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 12:07:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2022-03-18 12:07:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 12:07:27,639 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 12:07:27,639 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 12:07:27,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 12:07:27,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 12:07:27,844 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 12:07:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 12:07:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -486189394, now seen corresponding path program 6 times [2022-03-18 12:07:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 12:07:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881608525] [2022-03-18 12:07:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 12:07:27,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 12:07:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 12:07:27,897 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 12:07:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 12:07:27,948 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 12:07:27,948 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 12:07:27,948 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 12:07:27,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 12:07:27,953 INFO L718 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1] [2022-03-18 12:07:27,955 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 12:07:28,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 12:07:28 BoogieIcfgContainer [2022-03-18 12:07:28,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 12:07:28,027 INFO L158 Benchmark]: Toolchain (without parser) took 813186.75ms. Allocated memory was 200.3MB in the beginning and 289.4MB in the end (delta: 89.1MB). Free memory was 146.5MB in the beginning and 94.4MB in the end (delta: 52.1MB). Peak memory consumption was 141.2MB. Max. memory is 8.0GB. [2022-03-18 12:07:28,027 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory is still 162.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 12:07:28,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.01ms. Allocated memory is still 200.3MB. Free memory was 146.3MB in the beginning and 173.7MB in the end (delta: -27.5MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-03-18 12:07:28,028 INFO L158 Benchmark]: Boogie Preprocessor took 17.33ms. Allocated memory is still 200.3MB. Free memory was 173.7MB in the beginning and 172.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 12:07:28,028 INFO L158 Benchmark]: RCFGBuilder took 237.92ms. Allocated memory is still 200.3MB. Free memory was 172.3MB in the beginning and 162.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-18 12:07:28,029 INFO L158 Benchmark]: TraceAbstraction took 812724.06ms. Allocated memory was 200.3MB in the beginning and 289.4MB in the end (delta: 89.1MB). Free memory was 162.2MB in the beginning and 94.4MB in the end (delta: 67.8MB). Peak memory consumption was 157.9MB. Max. memory is 8.0GB. [2022-03-18 12:07:28,030 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory is still 162.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.01ms. Allocated memory is still 200.3MB. Free memory was 146.3MB in the beginning and 173.7MB in the end (delta: -27.5MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.33ms. Allocated memory is still 200.3MB. Free memory was 173.7MB in the beginning and 172.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 237.92ms. Allocated memory is still 200.3MB. Free memory was 172.3MB in the beginning and 162.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 812724.06ms. Allocated memory was 200.3MB in the beginning and 289.4MB in the end (delta: 89.1MB). Free memory was 162.2MB in the beginning and 94.4MB in the end (delta: 67.8MB). Peak memory consumption was 157.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 VAL [x=0, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=2, y=4294967295] [L17] COND TRUE x < 99 VAL [x=2, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=4, y=4294967295] [L17] COND TRUE x < 99 VAL [x=4, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=6, y=4294967295] [L17] COND TRUE x < 99 VAL [x=6, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=8, y=4294967295] [L17] COND TRUE x < 99 VAL [x=8, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=10, y=4294967295] [L17] COND TRUE x < 99 VAL [x=10, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=12, y=4294967295] [L17] COND TRUE x < 99 VAL [x=12, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=14, y=4294967295] [L17] COND TRUE x < 99 VAL [x=14, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=16, y=4294967295] [L17] COND TRUE x < 99 VAL [x=16, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=18, y=4294967295] [L17] COND TRUE x < 99 VAL [x=18, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=20, y=4294967295] [L17] COND TRUE x < 99 VAL [x=20, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=22, y=4294967295] [L17] COND TRUE x < 99 VAL [x=22, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=24, y=4294967295] [L17] COND TRUE x < 99 VAL [x=24, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=26, y=4294967295] [L17] COND TRUE x < 99 VAL [x=26, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=28, y=4294967295] [L17] COND TRUE x < 99 VAL [x=28, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=30, y=4294967295] [L17] COND TRUE x < 99 VAL [x=30, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=32, y=4294967295] [L17] COND TRUE x < 99 VAL [x=32, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=34, y=4294967295] [L17] COND TRUE x < 99 VAL [x=34, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=36, y=4294967295] [L17] COND TRUE x < 99 VAL [x=36, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=38, y=4294967295] [L17] COND TRUE x < 99 VAL [x=38, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=40, y=4294967295] [L17] COND TRUE x < 99 VAL [x=40, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=42, y=4294967295] [L17] COND TRUE x < 99 VAL [x=42, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=44, y=4294967295] [L17] COND TRUE x < 99 VAL [x=44, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=46, y=4294967295] [L17] COND TRUE x < 99 VAL [x=46, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=48, y=4294967295] [L17] COND TRUE x < 99 VAL [x=48, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=50, y=4294967295] [L17] COND TRUE x < 99 VAL [x=50, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=52, y=4294967295] [L17] COND TRUE x < 99 VAL [x=52, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=54, y=4294967295] [L17] COND TRUE x < 99 VAL [x=54, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=56, y=4294967295] [L17] COND TRUE x < 99 VAL [x=56, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=58, y=4294967295] [L17] COND TRUE x < 99 VAL [x=58, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=60, y=4294967295] [L17] COND TRUE x < 99 VAL [x=60, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=62, y=4294967295] [L17] COND TRUE x < 99 VAL [x=62, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=64, y=4294967295] [L17] COND TRUE x < 99 VAL [x=64, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=66, y=4294967295] [L17] COND TRUE x < 99 VAL [x=66, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=68, y=4294967295] [L17] COND TRUE x < 99 VAL [x=68, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=70, y=4294967295] [L17] COND TRUE x < 99 VAL [x=70, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=72, y=4294967295] [L17] COND TRUE x < 99 VAL [x=72, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=74, y=4294967295] [L17] COND TRUE x < 99 VAL [x=74, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=76, y=4294967295] [L17] COND TRUE x < 99 VAL [x=76, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=78, y=4294967295] [L17] COND TRUE x < 99 VAL [x=78, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=80, y=4294967295] [L17] COND TRUE x < 99 VAL [x=80, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=82, y=4294967295] [L17] COND TRUE x < 99 VAL [x=82, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=84, y=4294967295] [L17] COND TRUE x < 99 VAL [x=84, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=86, y=4294967295] [L17] COND TRUE x < 99 VAL [x=86, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=88, y=4294967295] [L17] COND TRUE x < 99 VAL [x=88, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=90, y=4294967295] [L17] COND TRUE x < 99 VAL [x=90, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=92, y=4294967295] [L17] COND TRUE x < 99 VAL [x=92, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=94, y=4294967295] [L17] COND TRUE x < 99 VAL [x=94, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=96, y=4294967295] [L17] COND TRUE x < 99 VAL [x=96, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=98, y=4294967295] [L17] COND TRUE x < 99 VAL [x=98, y=4294967295] [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 VAL [x=100, y=4294967295] [L17] COND FALSE !(x < 99) VAL [x=100, y=4294967295] [L25] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 812.6s, OverallIterations: 14, TraceHistogramMax: 50, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 727.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 604 SdHoareTripleChecker+Valid, 7.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 603 mSDsluCounter, 1064 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 902 mSDsCounter, 3138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13290 IncrementalHoareTripleChecker+Invalid, 16428 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3138 mSolverCounterUnsat, 162 mSDtfsCounter, 13290 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1406 GetRequests, 691 SyntacticMatches, 8 SemanticMatches, 707 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13841 ImplicationChecksByTransitivity, 727.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265occurred in iteration=13, InterpolantAutomatonStates: 380, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 192 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 71.1s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 1037 NumberOfCodeBlocks, 1037 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 1314 ConstructedInterpolants, 0 QuantifiedInterpolants, 7397 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1194 ConjunctsInSsa, 350 ConjunctsInUnsatCore, 31 InterpolantComputations, 4 PerfectInterpolantSequences, 379/14314 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 proved your program to be incorrect! [2022-03-18 12:07:28,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...