/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-simple/deep-nested.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:27:23,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:27:23,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:27:23,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:27:23,328 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 [2022-03-19 23:27:23,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:27:23,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:27:23,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:27:23,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:27:23,342 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:27:23,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:27:23,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:27:23,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:27:23,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:27:23,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:27:23,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:27:23,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:27:23,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:27:23,345 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:27:23,345 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:27:23,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:27:23,345 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:27:23,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:27:23,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:27:23,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:27:23,523 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:27:23,523 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:27:23,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-19 23:27:23,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebc0b318f/3da6fd5a41f047ba92322792d3449001/FLAG49c451448 [2022-03-19 23:27:24,046 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:27:24,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/deep-nested.c [2022-03-19 23:27:24,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebc0b318f/3da6fd5a41f047ba92322792d3449001/FLAG49c451448 [2022-03-19 23:27:24,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebc0b318f/3da6fd5a41f047ba92322792d3449001 [2022-03-19 23:27:24,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:27:24,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:27:24,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:27:24,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:27:24,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:27:24,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52643aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24, skipping insertion in model container [2022-03-19 23:27:24,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:27:24,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:27:24,284 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-simple/deep-nested.c[625,638] [2022-03-19 23:27:24,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:27:24,293 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:27:24,305 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-simple/deep-nested.c[625,638] [2022-03-19 23:27:24,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:27:24,314 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:27:24,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24 WrapperNode [2022-03-19 23:27:24,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:27:24,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:27:24,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:27:24,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:27:24,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:27:24,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:27:24,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:27:24,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:27:24,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (1/1) ... [2022-03-19 23:27:24,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:27:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:24,387 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) [2022-03-19 23:27:24,393 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 [2022-03-19 23:27:24,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:27:24,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:27:24,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:27:24,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:27:24,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:27:24,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:27:24,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:27:24,453 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:27:24,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:27:24,598 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:27:24,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:27:24,602 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-19 23:27:24,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:27:24 BoogieIcfgContainer [2022-03-19 23:27:24,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:27:24,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:27:24,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:27:24,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:27:24,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:27:24" (1/3) ... [2022-03-19 23:27:24,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c082807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:27:24, skipping insertion in model container [2022-03-19 23:27:24,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:27:24" (2/3) ... [2022-03-19 23:27:24,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c082807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:27:24, skipping insertion in model container [2022-03-19 23:27:24,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:27:24" (3/3) ... [2022-03-19 23:27:24,621 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-03-19 23:27:24,624 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:27:24,624 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 23:27:24,703 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:27:24,708 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 [2022-03-19 23:27:24,708 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 23:27:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 23:27:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 23:27:24,737 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:24,738 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:24,738 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash 764687304, now seen corresponding path program 1 times [2022-03-19 23:27:24,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:24,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821367365] [2022-03-19 23:27:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:24,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:27:25,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:25,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821367365] [2022-03-19 23:27:25,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821367365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:25,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:27:25,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 23:27:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249470294] [2022-03-19 23:27:25,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:25,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:27:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:27:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:27:25,072 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:25,183 INFO L93 Difference]: Finished difference Result 45 states and 68 transitions. [2022-03-19 23:27:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:27:25,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-19 23:27:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:25,193 INFO L225 Difference]: With dead ends: 45 [2022-03-19 23:27:25,194 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 23:27:25,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-19 23:27:25,202 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:25,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:27:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 23:27:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-19 23:27:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-19 23:27:25,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-03-19 23:27:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:25,239 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-19 23:27:25,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,239 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-19 23:27:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-19 23:27:25,240 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:25,240 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:25,240 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:27:25,240 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 296825287, now seen corresponding path program 1 times [2022-03-19 23:27:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:25,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628830521] [2022-03-19 23:27:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:27:25,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:25,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628830521] [2022-03-19 23:27:25,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628830521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:25,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:27:25,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:27:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306542462] [2022-03-19 23:27:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:25,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:27:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:27:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:27:25,448 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:25,495 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-03-19 23:27:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:27:25,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-19 23:27:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:25,496 INFO L225 Difference]: With dead ends: 36 [2022-03-19 23:27:25,496 INFO L226 Difference]: Without dead ends: 34 [2022-03-19 23:27:25,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:27:25,497 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:25,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 19 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:27:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-19 23:27:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-03-19 23:27:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-03-19 23:27:25,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 16 [2022-03-19 23:27:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:25,504 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-03-19 23:27:25,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-03-19 23:27:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-19 23:27:25,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:25,505 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:25,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 23:27:25,505 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:25,506 INFO L85 PathProgramCache]: Analyzing trace with hash -17409223, now seen corresponding path program 1 times [2022-03-19 23:27:25,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:25,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203425121] [2022-03-19 23:27:25,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 23:27:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203425121] [2022-03-19 23:27:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203425121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082531777] [2022-03-19 23:27:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:25,630 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) [2022-03-19 23:27:25,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 23:27:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:27:25,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:27:25,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:27:25,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082531777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:25,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:27:25,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-03-19 23:27:25,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380330437] [2022-03-19 23:27:25,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:25,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:27:25,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:27:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:27:25,720 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:25,766 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2022-03-19 23:27:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 23:27:25,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-19 23:27:25,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:25,767 INFO L225 Difference]: With dead ends: 71 [2022-03-19 23:27:25,767 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 23:27:25,767 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:27:25,768 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:25,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:27:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 23:27:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-03-19 23:27:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-03-19 23:27:25,774 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2022-03-19 23:27:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:25,774 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-03-19 23:27:25,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-03-19 23:27:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 23:27:25,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:25,775 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:25,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:25,981 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 [2022-03-19 23:27:25,982 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:25,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2030128119, now seen corresponding path program 1 times [2022-03-19 23:27:25,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:25,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665713958] [2022-03-19 23:27:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:25,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:26,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 23:27:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:26,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665713958] [2022-03-19 23:27:26,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665713958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:26,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816665212] [2022-03-19 23:27:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:26,118 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) [2022-03-19 23:27:26,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 23:27:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:26,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:27:26,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:27:26,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:27:26,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816665212] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:26,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:27:26,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-19 23:27:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184678477] [2022-03-19 23:27:26,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:26,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:27:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:27:26,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:27:26,218 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:26,284 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2022-03-19 23:27:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:27:26,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-19 23:27:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:26,285 INFO L225 Difference]: With dead ends: 80 [2022-03-19 23:27:26,285 INFO L226 Difference]: Without dead ends: 54 [2022-03-19 23:27:26,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:27:26,286 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:26,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:27:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-19 23:27:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2022-03-19 23:27:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-19 23:27:26,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2022-03-19 23:27:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:26,292 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-19 23:27:26,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-19 23:27:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 23:27:26,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:26,293 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:26,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-19 23:27:26,499 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 [2022-03-19 23:27:26,502 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2133052323, now seen corresponding path program 1 times [2022-03-19 23:27:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910964036] [2022-03-19 23:27:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:26,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:26,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 23:27:26,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:26,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910964036] [2022-03-19 23:27:26,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910964036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:26,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534348406] [2022-03-19 23:27:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:26,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:26,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:26,660 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) [2022-03-19 23:27:26,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 23:27:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 23:27:26,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:27:26,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:27:26,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534348406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:26,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:27:26,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-03-19 23:27:26,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403595075] [2022-03-19 23:27:26,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:26,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 23:27:26,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 23:27:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-19 23:27:26,751 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:26,807 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-03-19 23:27:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 23:27:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 23:27:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:26,808 INFO L225 Difference]: With dead ends: 80 [2022-03-19 23:27:26,808 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 23:27:26,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 23:27:26,809 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:26,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:27:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 23:27:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-03-19 23:27:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-03-19 23:27:26,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 25 [2022-03-19 23:27:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:26,816 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-03-19 23:27:26,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-03-19 23:27:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 23:27:26,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:26,817 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:26,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:27,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:27,032 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:27,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:27,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1145953084, now seen corresponding path program 1 times [2022-03-19 23:27:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:27,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491287974] [2022-03-19 23:27:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:27,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 23:27:27,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491287974] [2022-03-19 23:27:27,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491287974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066592646] [2022-03-19 23:27:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:27,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:27,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:27,208 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) [2022-03-19 23:27:27,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 23:27:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:27,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:27:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:27:27,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-19 23:27:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066592646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:27,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:27,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-19 23:27:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084883656] [2022-03-19 23:27:27,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:27,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:27:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:27:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:27:27,585 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:29,222 INFO L93 Difference]: Finished difference Result 190 states and 247 transitions. [2022-03-19 23:27:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 23:27:29,222 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 1 states have call successors, (3), 2 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 31 [2022-03-19 23:27:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:29,223 INFO L225 Difference]: With dead ends: 190 [2022-03-19 23:27:29,223 INFO L226 Difference]: Without dead ends: 115 [2022-03-19 23:27:29,224 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=578, Invalid=1972, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 23:27:29,225 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 684 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:29,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 68 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:27:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-19 23:27:29,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 75. [2022-03-19 23:27:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 71 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:29,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-03-19 23:27:29,237 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 31 [2022-03-19 23:27:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:29,237 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-03-19 23:27:29,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-03-19 23:27:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 23:27:29,238 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:29,238 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:29,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:29,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:29,439 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:29,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash 474201334, now seen corresponding path program 2 times [2022-03-19 23:27:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:29,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963461953] [2022-03-19 23:27:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:29,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 23:27:29,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963461953] [2022-03-19 23:27:29,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963461953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531813449] [2022-03-19 23:27:29,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:27:29,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:29,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:29,629 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) [2022-03-19 23:27:29,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 23:27:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 23:27:29,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:27:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-03-19 23:27:29,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:27:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531813449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:29,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:27:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-19 23:27:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248694723] [2022-03-19 23:27:29,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:29,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:27:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:27:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:27:29,804 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:29,834 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-03-19 23:27:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:27:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-19 23:27:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:29,835 INFO L225 Difference]: With dead ends: 77 [2022-03-19 23:27:29,835 INFO L226 Difference]: Without dead ends: 75 [2022-03-19 23:27:29,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:27:29,836 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:29,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:27:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-19 23:27:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-19 23:27:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-03-19 23:27:29,847 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 52 [2022-03-19 23:27:29,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:29,847 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-03-19 23:27:29,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-03-19 23:27:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 23:27:29,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:29,848 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:29,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:30,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:30,065 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:30,065 INFO L85 PathProgramCache]: Analyzing trace with hash -45068196, now seen corresponding path program 3 times [2022-03-19 23:27:30,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:30,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400369052] [2022-03-19 23:27:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:30,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:30,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-03-19 23:27:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400369052] [2022-03-19 23:27:30,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400369052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:30,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700599957] [2022-03-19 23:27:30,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:27:30,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:30,218 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) [2022-03-19 23:27:30,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 23:27:30,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-03-19 23:27:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:30,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:27:30,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-19 23:27:30,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 23:27:30,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700599957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:27:30,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 23:27:30,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-03-19 23:27:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994548086] [2022-03-19 23:27:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:27:30,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:27:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:30,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:27:30,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:27:30,407 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:30,447 INFO L93 Difference]: Finished difference Result 121 states and 143 transitions. [2022-03-19 23:27:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:27:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-19 23:27:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:30,448 INFO L225 Difference]: With dead ends: 121 [2022-03-19 23:27:30,448 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 23:27:30,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-19 23:27:30,449 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:30,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:27:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 23:27:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-03-19 23:27:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.2125) internal successors, (97), 80 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-03-19 23:27:30,461 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 67 [2022-03-19 23:27:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:30,461 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-03-19 23:27:30,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-03-19 23:27:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 23:27:30,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:30,462 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:30,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:30,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:30,691 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1966490666, now seen corresponding path program 4 times [2022-03-19 23:27:30,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:30,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411715017] [2022-03-19 23:27:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:30,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-19 23:27:30,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:30,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411715017] [2022-03-19 23:27:30,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411715017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:30,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088214691] [2022-03-19 23:27:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:27:30,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:30,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:30,876 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) [2022-03-19 23:27:30,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 23:27:30,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:27:30,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:30,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 23:27:30,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 153 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 23:27:31,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 153 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-03-19 23:27:31,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088214691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:31,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:31,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-03-19 23:27:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873111570] [2022-03-19 23:27:31,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:31,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 23:27:31,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 23:27:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-19 23:27:31,297 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:32,209 INFO L93 Difference]: Finished difference Result 398 states and 493 transitions. [2022-03-19 23:27:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-19 23:27:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 1 states have call successors, (3), 2 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 79 [2022-03-19 23:27:32,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:32,210 INFO L225 Difference]: With dead ends: 398 [2022-03-19 23:27:32,210 INFO L226 Difference]: Without dead ends: 244 [2022-03-19 23:27:32,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 23:27:32,215 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 292 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:32,215 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 67 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:27:32,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-19 23:27:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2022-03-19 23:27:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 165 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 191 transitions. [2022-03-19 23:27:32,246 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 191 transitions. Word has length 79 [2022-03-19 23:27:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:32,247 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 191 transitions. [2022-03-19 23:27:32,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 17 states have internal predecessors, (81), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 191 transitions. [2022-03-19 23:27:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-19 23:27:32,254 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:32,254 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:32,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 23:27:32,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:32,470 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1047558925, now seen corresponding path program 5 times [2022-03-19 23:27:32,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:32,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993290915] [2022-03-19 23:27:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:32,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 26 proven. 385 refuted. 0 times theorem prover too weak. 1822 trivial. 0 not checked. [2022-03-19 23:27:32,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993290915] [2022-03-19 23:27:32,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993290915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:32,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606372151] [2022-03-19 23:27:32,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:27:32,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:32,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:32,798 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) [2022-03-19 23:27:32,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 23:27:33,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-19 23:27:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 23:27:33,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 659 proven. 626 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-03-19 23:27:34,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2233 backedges. 509 proven. 776 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2022-03-19 23:27:34,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606372151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:34,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:34,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 33 [2022-03-19 23:27:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618823729] [2022-03-19 23:27:34,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:34,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:27:34,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:27:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:27:34,558 INFO L87 Difference]: Start difference. First operand 169 states and 191 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:37,491 INFO L93 Difference]: Finished difference Result 668 states and 797 transitions. [2022-03-19 23:27:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 23:27:37,492 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 1 states have call successors, (3), 2 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 166 [2022-03-19 23:27:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:37,493 INFO L225 Difference]: With dead ends: 668 [2022-03-19 23:27:37,493 INFO L226 Difference]: Without dead ends: 396 [2022-03-19 23:27:37,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=881, Invalid=4089, Unknown=0, NotChecked=0, Total=4970 [2022-03-19 23:27:37,496 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 509 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:37,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 107 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 23:27:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-03-19 23:27:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 355. [2022-03-19 23:27:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 351 states have (on average 1.0940170940170941) internal successors, (384), 351 states have internal predecessors, (384), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 387 transitions. [2022-03-19 23:27:37,537 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 387 transitions. Word has length 166 [2022-03-19 23:27:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:37,537 INFO L478 AbstractCegarLoop]: Abstraction has 355 states and 387 transitions. [2022-03-19 23:27:37,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 387 transitions. [2022-03-19 23:27:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-03-19 23:27:37,540 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:37,540 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 81, 19, 18, 18, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:37,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 23:27:37,745 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,SelfDestructingSolverStorable9 [2022-03-19 23:27:37,746 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:37,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2109850647, now seen corresponding path program 6 times [2022-03-19 23:27:37,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:37,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119733925] [2022-03-19 23:27:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:38,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 34 proven. 1194 refuted. 0 times theorem prover too weak. 10737 trivial. 0 not checked. [2022-03-19 23:27:38,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:38,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119733925] [2022-03-19 23:27:38,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119733925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:38,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194200526] [2022-03-19 23:27:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 23:27:38,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:38,304 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) [2022-03-19 23:27:38,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 23:27:38,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 23:27:38,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:27:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 23:27:38,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 5649 proven. 819 refuted. 0 times theorem prover too weak. 5497 trivial. 0 not checked. [2022-03-19 23:27:39,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 11965 backedges. 0 proven. 6468 refuted. 0 times theorem prover too weak. 5497 trivial. 0 not checked. [2022-03-19 23:27:39,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194200526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:39,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:39,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2022-03-19 23:27:39,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304428810] [2022-03-19 23:27:39,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:39,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 23:27:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 23:27:39,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-03-19 23:27:39,802 INFO L87 Difference]: Start difference. First operand 355 states and 387 transitions. Second operand has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 16 states have internal predecessors, (107), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:41,110 INFO L93 Difference]: Finished difference Result 2267 states and 2580 transitions. [2022-03-19 23:27:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-19 23:27:41,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 16 states have internal predecessors, (107), 1 states have call successors, (3), 2 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 334 [2022-03-19 23:27:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:41,115 INFO L225 Difference]: With dead ends: 2267 [2022-03-19 23:27:41,115 INFO L226 Difference]: Without dead ends: 1921 [2022-03-19 23:27:41,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=710, Invalid=2046, Unknown=0, NotChecked=0, Total=2756 [2022-03-19 23:27:41,117 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 345 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:41,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 48 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:27:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-03-19 23:27:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 982. [2022-03-19 23:27:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 978 states have (on average 1.0664621676891615) internal successors, (1043), 978 states have internal predecessors, (1043), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1046 transitions. [2022-03-19 23:27:41,220 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1046 transitions. Word has length 334 [2022-03-19 23:27:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:41,220 INFO L478 AbstractCegarLoop]: Abstraction has 982 states and 1046 transitions. [2022-03-19 23:27:41,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.294117647058823) internal successors, (107), 16 states have internal predecessors, (107), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1046 transitions. [2022-03-19 23:27:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2022-03-19 23:27:41,245 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:41,245 INFO L499 BasicCegarLoop]: trace histogram [259, 258, 258, 43, 42, 42, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:41,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 23:27:41,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:41,461 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:41,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash 281042346, now seen corresponding path program 7 times [2022-03-19 23:27:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:41,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636897073] [2022-03-19 23:27:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:41,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:27:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:43,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:27:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 70 proven. 5391 refuted. 0 times theorem prover too weak. 108642 trivial. 0 not checked. [2022-03-19 23:27:43,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:27:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636897073] [2022-03-19 23:27:43,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636897073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:27:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851461866] [2022-03-19 23:27:43,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 23:27:43,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:27:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:27:43,327 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:27:43,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 23:27:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:27:43,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:27:43,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:27:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 34688 proven. 2149 refuted. 0 times theorem prover too weak. 77266 trivial. 0 not checked. [2022-03-19 23:27:45,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:27:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 114103 backedges. 34684 proven. 2153 refuted. 0 times theorem prover too weak. 77266 trivial. 0 not checked. [2022-03-19 23:27:46,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851461866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:27:46,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:27:46,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-03-19 23:27:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724400197] [2022-03-19 23:27:46,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:27:46,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 23:27:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:27:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 23:27:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-19 23:27:46,129 INFO L87 Difference]: Start difference. First operand 982 states and 1046 transitions. Second operand has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:27:52,577 INFO L93 Difference]: Finished difference Result 4158 states and 4682 transitions. [2022-03-19 23:27:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-19 23:27:52,578 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (3), 2 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 955 [2022-03-19 23:27:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:27:52,594 INFO L225 Difference]: With dead ends: 4158 [2022-03-19 23:27:52,595 INFO L226 Difference]: Without dead ends: 3205 [2022-03-19 23:27:52,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1900 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1569, Invalid=7743, Unknown=0, NotChecked=0, Total=9312 [2022-03-19 23:27:52,598 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 820 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:27:52,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 89 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 23:27:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2022-03-19 23:27:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2835. [2022-03-19 23:27:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2831 states have (on average 1.0452137054044508) internal successors, (2959), 2831 states have internal predecessors, (2959), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 2962 transitions. [2022-03-19 23:27:53,090 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 2962 transitions. Word has length 955 [2022-03-19 23:27:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:27:53,090 INFO L478 AbstractCegarLoop]: Abstraction has 2835 states and 2962 transitions. [2022-03-19 23:27:53,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.407407407407407) internal successors, (119), 26 states have internal predecessors, (119), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:27:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 2962 transitions. [2022-03-19 23:27:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2801 [2022-03-19 23:27:53,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:27:53,349 INFO L499 BasicCegarLoop]: trace histogram [809, 808, 808, 95, 94, 94, 24, 23, 23, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:27:53,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-19 23:27:53,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 23:27:53,595 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:27:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:27:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1604012116, now seen corresponding path program 8 times [2022-03-19 23:27:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:27:53,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094453315] [2022-03-19 23:27:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:27:53,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:28:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:28:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:28:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 148 proven. 24237 refuted. 0 times theorem prover too weak. 1047624 trivial. 0 not checked. [2022-03-19 23:28:01,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:28:01,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094453315] [2022-03-19 23:28:01,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094453315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:28:01,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457880781] [2022-03-19 23:28:01,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:28:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:28:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:28:01,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:28:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 23:28:02,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:28:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:28:02,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 4025 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 23:28:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:28:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 536686 proven. 138269 refuted. 0 times theorem prover too weak. 397054 trivial. 0 not checked. [2022-03-19 23:28:09,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:28:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1072009 backedges. 536651 proven. 138304 refuted. 0 times theorem prover too weak. 397054 trivial. 0 not checked. [2022-03-19 23:28:13,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457880781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:28:13,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:28:13,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-03-19 23:28:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699788727] [2022-03-19 23:28:13,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:28:13,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 23:28:13,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:28:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 23:28:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-19 23:28:13,161 INFO L87 Difference]: Start difference. First operand 2835 states and 2962 transitions. Second operand has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 29 states have internal predecessors, (140), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:28:22,752 INFO L93 Difference]: Finished difference Result 14996 states and 16601 transitions. [2022-03-19 23:28:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-19 23:28:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 29 states have internal predecessors, (140), 1 states have call successors, (3), 2 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 2800 [2022-03-19 23:28:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:28:22,778 INFO L225 Difference]: With dead ends: 14996 [2022-03-19 23:28:22,778 INFO L226 Difference]: Without dead ends: 12199 [2022-03-19 23:28:22,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 5706 GetRequests, 5590 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2079, Invalid=11727, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 23:28:22,786 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 1143 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2024 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 2024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 23:28:22,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 86 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 2024 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 23:28:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12199 states. [2022-03-19 23:28:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12199 to 11067. [2022-03-19 23:28:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11067 states, 11063 states have (on average 1.033987164421947) internal successors, (11439), 11063 states have internal predecessors, (11439), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11067 states to 11067 states and 11442 transitions. [2022-03-19 23:28:24,179 INFO L78 Accepts]: Start accepts. Automaton has 11067 states and 11442 transitions. Word has length 2800 [2022-03-19 23:28:24,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:28:24,179 INFO L478 AbstractCegarLoop]: Abstraction has 11067 states and 11442 transitions. [2022-03-19 23:28:24,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.666666666666667) internal successors, (140), 29 states have internal predecessors, (140), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:28:24,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11067 states and 11442 transitions. [2022-03-19 23:28:24,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11024 [2022-03-19 23:28:24,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:28:24,922 INFO L499 BasicCegarLoop]: trace histogram [3302, 3301, 3301, 287, 286, 286, 72, 71, 71, 12, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:28:24,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 23:28:25,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 23:28:25,135 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:28:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:28:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1857147531, now seen corresponding path program 9 times [2022-03-19 23:28:25,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:28:25,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762501267] [2022-03-19 23:28:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:28:25,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:30:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:46,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:30:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:30:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 452 proven. 128922 refuted. 0 times theorem prover too weak. 17312985 trivial. 0 not checked. [2022-03-19 23:30:47,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:30:47,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762501267] [2022-03-19 23:30:47,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762501267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:30:47,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54390341] [2022-03-19 23:30:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:30:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:30:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:30:47,155 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 23:30:47,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 23:30:47,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-19 23:30:47,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:30:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 23:30:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:31:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 0 proven. 8723839 refuted. 0 times theorem prover too weak. 8718520 trivial. 0 not checked. [2022-03-19 23:31:22,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:31:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17442359 backedges. 0 proven. 8723839 refuted. 0 times theorem prover too weak. 8718520 trivial. 0 not checked. [2022-03-19 23:31:45,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54390341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:31:45,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:31:45,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 23 [2022-03-19 23:31:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702330963] [2022-03-19 23:31:45,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:31:45,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 23:31:45,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:31:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 23:31:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-19 23:31:45,959 INFO L87 Difference]: Start difference. First operand 11067 states and 11442 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:31:53,927 INFO L93 Difference]: Finished difference Result 45901 states and 48798 transitions. [2022-03-19 23:31:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-19 23:31:53,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 1 states have call successors, (3), 2 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 11023 [2022-03-19 23:31:53,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:31:54,019 INFO L225 Difference]: With dead ends: 45901 [2022-03-19 23:31:54,019 INFO L226 Difference]: Without dead ends: 33197 [2022-03-19 23:31:54,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22145 GetRequests, 22045 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1341, Invalid=8961, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 23:31:54,048 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 795 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1778 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 23:31:54,048 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 76 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1778 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 23:31:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33197 states. [2022-03-19 23:31:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33197 to 31758. [2022-03-19 23:31:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31758 states, 31754 states have (on average 1.0295080934685394) internal successors, (32691), 31754 states have internal predecessors, (32691), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31758 states to 31758 states and 32694 transitions. [2022-03-19 23:31:58,108 INFO L78 Accepts]: Start accepts. Automaton has 31758 states and 32694 transitions. Word has length 11023 [2022-03-19 23:31:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:31:58,109 INFO L478 AbstractCegarLoop]: Abstraction has 31758 states and 32694 transitions. [2022-03-19 23:31:58,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 23:31:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 31758 states and 32694 transitions. [2022-03-19 23:32:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31709 [2022-03-19 23:32:03,695 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:32:03,701 INFO L499 BasicCegarLoop]: trace histogram [9636, 9635, 9635, 719, 718, 718, 180, 179, 179, 30, 29, 29, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:32:03,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 23:32:03,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 23:32:03,917 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:32:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:32:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1853051363, now seen corresponding path program 10 times [2022-03-19 23:32:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:32:03,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028608684] [2022-03-19 23:32:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:32:03,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms