/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-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-05 23:56:58,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 23:56:58,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 23:56:58,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 23:56:58,371 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 [2022-04-05 23:56:58,383 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 23:56:58,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 23:56:58,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-04-05 23:56:58,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-04-05 23:56:58,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 23:56:58,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 23:56:58,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 23:56:58,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 23:56:58,384 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 23:56:58,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 23:56:58,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 23:56:58,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:56:58,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 23:56:58,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 23:56:58,387 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-04-05 23:56:58,387 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-04-05 23:56:58,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 23:56:58,387 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 23:56:58,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 23:56:58,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 23:56:58,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 23:56:58,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 23:56:58,579 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 23:56:58,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2022-04-05 23:56:58,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5a66b96/57f1fd14f62241d19015267ee355d442/FLAG3618feb7e [2022-04-05 23:56:58,943 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 23:56:58,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2022-04-05 23:56:58,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5a66b96/57f1fd14f62241d19015267ee355d442/FLAG3618feb7e [2022-04-05 23:56:59,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e5a66b96/57f1fd14f62241d19015267ee355d442 [2022-04-05 23:56:59,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 23:56:59,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-05 23:56:59,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 23:56:59,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 23:56:59,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 23:56:59,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17830a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59, skipping insertion in model container [2022-04-05 23:56:59,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 23:56:59,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 23:56:59,512 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-industry-pattern/mod3.c[394,407] [2022-04-05 23:56:59,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:56:59,530 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 23:56:59,537 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-industry-pattern/mod3.c[394,407] [2022-04-05 23:56:59,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 23:56:59,550 INFO L208 MainTranslator]: Completed translation [2022-04-05 23:56:59,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59 WrapperNode [2022-04-05 23:56:59,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 23:56:59,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 23:56:59,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 23:56:59,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 23:56:59,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 23:56:59,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 23:56:59,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 23:56:59,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 23:56:59,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (1/1) ... [2022-04-05 23:56:59,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 23:56:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:56:59,591 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) [2022-04-05 23:56:59,596 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 [2022-04-05 23:56:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 23:56:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 23:56:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 23:56:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 23:56:59,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 23:56:59,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 23:56:59,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 23:56:59,658 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 23:56:59,659 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 23:57:04,122 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 23:57:04,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 23:57:04,126 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 23:57:04,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:57:04 BoogieIcfgContainer [2022-04-05 23:57:04,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 23:57:04,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 23:57:04,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 23:57:04,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 23:57:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 11:56:59" (1/3) ... [2022-04-05 23:57:04,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a155bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:57:04, skipping insertion in model container [2022-04-05 23:57:04,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 11:56:59" (2/3) ... [2022-04-05 23:57:04,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a155bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 11:57:04, skipping insertion in model container [2022-04-05 23:57:04,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 11:57:04" (3/3) ... [2022-04-05 23:57:04,136 INFO L111 eAbstractionObserver]: Analyzing ICFG mod3.c [2022-04-05 23:57:04,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 23:57:04,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 23:57:04,182 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 23:57:04,199 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 [2022-04-05 23:57:04,199 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 23:57:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-04-05 23:57:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 23:57:04,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:04,230 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:04,230 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1060463359, now seen corresponding path program 1 times [2022-04-05 23:57:04,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:04,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740714700] [2022-04-05 23:57:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:04,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:04,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740714700] [2022-04-05 23:57:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740714700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:04,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:57:04,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 23:57:04,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171580529] [2022-04-05 23:57:04,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:04,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 23:57:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:04,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 23:57:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 23:57:04,446 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 18 states have internal predecessors, (24), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 23:57:06,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 23:57:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:06,657 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-04-05 23:57:06,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 23:57:06,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-04-05 23:57:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:06,663 INFO L225 Difference]: With dead ends: 38 [2022-04-05 23:57:06,663 INFO L226 Difference]: Without dead ends: 17 [2022-04-05 23:57:06,664 INFO L912 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 [2022-04-05 23:57:06,667 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:06,667 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-05 23:57:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-05 23:57:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-05 23:57:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-04-05 23:57:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-04-05 23:57:06,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-04-05 23:57:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:06,688 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-04-05 23:57:06,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 23:57:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-04-05 23:57:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 23:57:06,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:06,689 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:06,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 23:57:06,689 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1839610256, now seen corresponding path program 1 times [2022-04-05 23:57:06,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:06,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495807223] [2022-04-05 23:57:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:06,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:06,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:06,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495807223] [2022-04-05 23:57:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495807223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 23:57:06,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 23:57:06,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 23:57:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460570869] [2022-04-05 23:57:06,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 23:57:06,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 23:57:06,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 23:57:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 23:57:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 23:57:06,741 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-05 23:57:08,761 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 23:57:10,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 23:57:13,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 23:57:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 23:57:13,292 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-05 23:57:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 23:57:13,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-04-05 23:57:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 23:57:13,293 INFO L225 Difference]: With dead ends: 28 [2022-04-05 23:57:13,293 INFO L226 Difference]: Without dead ends: 22 [2022-04-05 23:57:13,293 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 23:57:13,294 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-04-05 23:57:13,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 10 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-04-05 23:57:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-05 23:57:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-04-05 23:57:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-04-05 23:57:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-04-05 23:57:13,298 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2022-04-05 23:57:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 23:57:13,298 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-04-05 23:57:13,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-04-05 23:57:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-04-05 23:57:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-05 23:57:13,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 23:57:13,299 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 23:57:13,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 23:57:13,299 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 23:57:13,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 23:57:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -496948910, now seen corresponding path program 1 times [2022-04-05 23:57:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 23:57:13,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200813622] [2022-04-05 23:57:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 23:57:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:13,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 23:57:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 23:57:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 23:57:13,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 23:57:13,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200813622] [2022-04-05 23:57:13,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200813622] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 23:57:13,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61889891] [2022-04-05 23:57:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 23:57:13,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 23:57:13,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 23:57:13,609 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) [2022-04-05 23:57:13,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process