/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-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 23:24:55,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 23:24:55,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 23:24:55,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 23:24:55,211 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 23:24:55,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 23:24:55,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 23:24:55,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 23:24:55,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 23:24:55,245 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 23:24:55,245 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 23:24:55,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 23:24:55,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 23:24:55,246 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 23:24:55,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 23:24:55,246 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 23:24:55,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 23:24:55,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 23:24:55,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 23:24:55,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 23:24:55,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 23:24:55,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 23:24:55,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 23:24:55,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 23:24:55,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 23:24:55,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 23:24:55,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 23:24:55,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 23:24:55,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 23:24:55,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:24:55,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 23:24:55,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 23:24:55,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 23:24:55,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 23:24:55,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 23:24:55,254 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 23:24:55,254 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 23:24:55,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 23:24:55,254 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 23:24:55,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 23:24:55,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 23:24:55,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 23:24:55,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 23:24:55,490 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 23:24:55,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-03-19 23:24:55,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3709686b2/3b3fbb4bcfbb4222a3679832a39f542c/FLAG0000768d5 [2022-03-19 23:24:55,911 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 23:24:55,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/linear-inequality-inv-a.c [2022-03-19 23:24:55,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3709686b2/3b3fbb4bcfbb4222a3679832a39f542c/FLAG0000768d5 [2022-03-19 23:24:56,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3709686b2/3b3fbb4bcfbb4222a3679832a39f542c [2022-03-19 23:24:56,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 23:24:56,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 23:24:56,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 23:24:56,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 23:24:56,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 23:24:56,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ce2e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56, skipping insertion in model container [2022-03-19 23:24:56,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 23:24:56,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 23:24:56,538 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-invariants/linear-inequality-inv-a.c[557,570] [2022-03-19 23:24:56,540 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-invariants/linear-inequality-inv-a.c[613,626] [2022-03-19 23:24:56,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:24:56,548 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 23:24:56,560 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-invariants/linear-inequality-inv-a.c[557,570] [2022-03-19 23:24:56,561 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-invariants/linear-inequality-inv-a.c[613,626] [2022-03-19 23:24:56,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 23:24:56,571 INFO L208 MainTranslator]: Completed translation [2022-03-19 23:24:56,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56 WrapperNode [2022-03-19 23:24:56,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 23:24:56,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 23:24:56,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 23:24:56,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 23:24:56,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,587 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 23:24:56,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 23:24:56,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 23:24:56,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 23:24:56,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (1/1) ... [2022-03-19 23:24:56,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 23:24:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:56,625 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 23:24:56,632 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 23:24:56,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 23:24:56,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 23:24:56,665 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 23:24:56,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 23:24:56,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 23:24:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 23:24:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 23:24:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 23:24:56,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 23:24:56,726 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 23:24:56,727 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 23:24:56,867 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 23:24:56,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 23:24:56,872 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 23:24:56,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:24:56 BoogieIcfgContainer [2022-03-19 23:24:56,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 23:24:56,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 23:24:56,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 23:24:56,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 23:24:56,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 11:24:56" (1/3) ... [2022-03-19 23:24:56,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63faafc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:24:56, skipping insertion in model container [2022-03-19 23:24:56,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 11:24:56" (2/3) ... [2022-03-19 23:24:56,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63faafc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 11:24:56, skipping insertion in model container [2022-03-19 23:24:56,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 11:24:56" (3/3) ... [2022-03-19 23:24:56,893 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2022-03-19 23:24:56,897 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 23:24:56,897 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-03-19 23:24:56,933 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 23:24:56,938 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 23:24:56,939 INFO L341 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-03-19 23:24:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 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 23:24:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-19 23:24:56,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:56,954 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:56,955 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1624254505, now seen corresponding path program 1 times [2022-03-19 23:24:56,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638620357] [2022-03-19 23:24:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:56,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,243 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 23:24:57,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638620357] [2022-03-19 23:24:57,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638620357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 23:24:57,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 23:24:57,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 23:24:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107294783] [2022-03-19 23:24:57,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 23:24:57,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 23:24:57,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 23:24:57,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 23:24:57,280 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 13 states have internal predecessors, (18), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 23:24:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:57,353 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-03-19 23:24:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 23:24:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2022-03-19 23:24:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:57,365 INFO L225 Difference]: With dead ends: 29 [2022-03-19 23:24:57,365 INFO L226 Difference]: Without dead ends: 15 [2022-03-19 23:24:57,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-19 23:24:57,376 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:57,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:24:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-19 23:24:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-19 23:24:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 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 23:24:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-19 23:24:57,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2022-03-19 23:24:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:57,409 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-19 23:24:57,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 23:24:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-19 23:24:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-19 23:24:57,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:57,411 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:57,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 23:24:57,412 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:57,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1187666007, now seen corresponding path program 1 times [2022-03-19 23:24:57,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:57,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540786234] [2022-03-19 23:24:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:57,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540786234] [2022-03-19 23:24:57,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540786234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:57,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646063406] [2022-03-19 23:24:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:57,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:57,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:57,551 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 23:24:57,552 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 23:24:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 23:24:57,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:57,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:57,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646063406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:57,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:57,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-19 23:24:57,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170743432] [2022-03-19 23:24:57,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:57,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 23:24:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 23:24:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-19 23:24:57,825 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 23:24:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:57,959 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-03-19 23:24:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:24:57,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 11 [2022-03-19 23:24:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:57,962 INFO L225 Difference]: With dead ends: 32 [2022-03-19 23:24:57,963 INFO L226 Difference]: Without dead ends: 26 [2022-03-19 23:24:57,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:24:57,971 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:57,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 23 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 23:24:57,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-19 23:24:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2022-03-19 23:24:57,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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 23:24:57,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-19 23:24:57,981 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 11 [2022-03-19 23:24:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:57,983 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-19 23:24:57,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 23:24:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-19 23:24:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-19 23:24:57,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:57,984 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:58,011 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 23:24:58,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:58,208 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:58,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:58,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1115879670, now seen corresponding path program 1 times [2022-03-19 23:24:58,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:58,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138271842] [2022-03-19 23:24:58,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:58,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:58,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138271842] [2022-03-19 23:24:58,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138271842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855603230] [2022-03-19 23:24:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:58,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:58,298 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 23:24:58,329 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 23:24:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:58,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 23:24:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:58,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:58,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855603230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:58,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:58,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-19 23:24:58,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336920687] [2022-03-19 23:24:58,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:58,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 23:24:58,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 23:24:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-19 23:24:58,597 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 23:24:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:24:58,787 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-03-19 23:24:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 23:24:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 13 [2022-03-19 23:24:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:24:58,788 INFO L225 Difference]: With dead ends: 30 [2022-03-19 23:24:58,788 INFO L226 Difference]: Without dead ends: 22 [2022-03-19 23:24:58,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-03-19 23:24:58,790 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:24:58,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 23 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:24:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-19 23:24:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-19 23:24:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 23:24:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-03-19 23:24:58,795 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-03-19 23:24:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:24:58,795 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-03-19 23:24:58,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 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 23:24:58,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-03-19 23:24:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 23:24:58,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:24:58,796 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:24:58,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 23:24:58,996 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,SelfDestructingSolverStorable2 [2022-03-19 23:24:58,997 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:24:58,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:24:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash 234096681, now seen corresponding path program 2 times [2022-03-19 23:24:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:24:58,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689083602] [2022-03-19 23:24:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:24:58,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:24:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:24:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:24:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:24:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689083602] [2022-03-19 23:24:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689083602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:24:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832036023] [2022-03-19 23:24:59,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:24:59,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:24:59,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:24:59,119 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 23:24:59,186 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 23:24:59,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:24:59,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:24:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 23:24:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:24:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:59,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:24:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:24:59,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832036023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:24:59,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:24:59,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-19 23:24:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619642621] [2022-03-19 23:24:59,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:24:59,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 23:24:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:24:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 23:24:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-03-19 23:24:59,626 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 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 23:25:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:00,008 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-03-19 23:25:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 23:25:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 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 14 [2022-03-19 23:25:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:00,009 INFO L225 Difference]: With dead ends: 44 [2022-03-19 23:25:00,009 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 23:25:00,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2022-03-19 23:25:00,010 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:00,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 33 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 23:25:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 23:25:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2022-03-19 23:25:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 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 23:25:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-19 23:25:00,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2022-03-19 23:25:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:00,022 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-19 23:25:00,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 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 23:25:00,022 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-19 23:25:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 23:25:00,023 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:00,023 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:00,047 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 23:25:00,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:00,224 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1001187082, now seen corresponding path program 2 times [2022-03-19 23:25:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:00,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768996615] [2022-03-19 23:25:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:00,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:00,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768996615] [2022-03-19 23:25:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768996615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782787834] [2022-03-19 23:25:00,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 23:25:00,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:00,387 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 23:25:00,388 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 23:25:00,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 23:25:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:00,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 23:25:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:00,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782787834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:00,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:00,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-03-19 23:25:00,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816247223] [2022-03-19 23:25:00,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:00,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 23:25:00,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:00,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 23:25:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-03-19 23:25:00,982 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 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 23:25:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:01,454 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-03-19 23:25:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 23:25:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 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 17 [2022-03-19 23:25:01,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:01,456 INFO L225 Difference]: With dead ends: 46 [2022-03-19 23:25:01,456 INFO L226 Difference]: Without dead ends: 32 [2022-03-19 23:25:01,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-03-19 23:25:01,458 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:01,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 28 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-19 23:25:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-03-19 23:25:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 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 23:25:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-19 23:25:01,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2022-03-19 23:25:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:01,466 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-19 23:25:01,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 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 23:25:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-19 23:25:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-19 23:25:01,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:01,467 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:01,491 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 23:25:01,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:01,676 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash -605562839, now seen corresponding path program 3 times [2022-03-19 23:25:01,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323253503] [2022-03-19 23:25:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:01,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:01,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:01,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:01,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323253503] [2022-03-19 23:25:01,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323253503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:01,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200254524] [2022-03-19 23:25:01,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:01,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:01,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:01,900 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 23:25:01,923 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 23:25:01,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-19 23:25:01,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 23:25:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:02,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:02,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200254524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:02,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:02,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-19 23:25:02,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311838669] [2022-03-19 23:25:02,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:02,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 23:25:02,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:02,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 23:25:02,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=398, Unknown=0, NotChecked=0, Total=650 [2022-03-19 23:25:02,949 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 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 23:25:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:03,914 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-03-19 23:25:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 23:25:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 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 20 [2022-03-19 23:25:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:03,915 INFO L225 Difference]: With dead ends: 74 [2022-03-19 23:25:03,915 INFO L226 Difference]: Without dead ends: 68 [2022-03-19 23:25:03,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=875, Invalid=1575, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:25:03,916 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:03,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 48 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 23:25:03,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-19 23:25:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 37. [2022-03-19 23:25:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 33 states have internal predecessors, (42), 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 23:25:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-03-19 23:25:03,925 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 20 [2022-03-19 23:25:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:03,925 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-03-19 23:25:03,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 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 23:25:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-03-19 23:25:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 23:25:03,926 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:03,926 INFO L499 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:03,951 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 23:25:04,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:04,148 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:04,148 INFO L85 PathProgramCache]: Analyzing trace with hash -524068618, now seen corresponding path program 3 times [2022-03-19 23:25:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:04,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692375415] [2022-03-19 23:25:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:04,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:04,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692375415] [2022-03-19 23:25:04,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692375415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:04,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372099312] [2022-03-19 23:25:04,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 23:25:04,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:04,424 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 23:25:04,426 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 23:25:04,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-19 23:25:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 23:25:04,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:04,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372099312] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:06,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:06,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-03-19 23:25:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137308188] [2022-03-19 23:25:06,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:06,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-19 23:25:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-19 23:25:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 23:25:06,018 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 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 23:25:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:07,039 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-03-19 23:25:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-19 23:25:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 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 25 [2022-03-19 23:25:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:07,040 INFO L225 Difference]: With dead ends: 78 [2022-03-19 23:25:07,040 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 23:25:07,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 15 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 23:25:07,043 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:07,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 33 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 23:25:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 23:25:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-03-19 23:25:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 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 23:25:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-03-19 23:25:07,052 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2022-03-19 23:25:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:07,052 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-03-19 23:25:07,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 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 23:25:07,052 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-03-19 23:25:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 23:25:07,053 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:07,053 INFO L499 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:07,059 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 23:25:07,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:07,256 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:07,256 INFO L85 PathProgramCache]: Analyzing trace with hash 645625897, now seen corresponding path program 4 times [2022-03-19 23:25:07,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:07,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145738042] [2022-03-19 23:25:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:07,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:07,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:07,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145738042] [2022-03-19 23:25:07,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145738042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:07,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34319297] [2022-03-19 23:25:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:07,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:07,664 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 23:25:07,665 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 23:25:07,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:07,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 23:25:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:10,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34319297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:10,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:10,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-19 23:25:10,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260057850] [2022-03-19 23:25:10,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:10,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-19 23:25:10,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:10,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-19 23:25:10,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=1382, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 23:25:10,389 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 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 23:25:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:13,240 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2022-03-19 23:25:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 23:25:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 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 32 [2022-03-19 23:25:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:13,241 INFO L225 Difference]: With dead ends: 134 [2022-03-19 23:25:13,241 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 23:25:13,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 21 SyntacticMatches, 21 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3467, Invalid=6039, Unknown=0, NotChecked=0, Total=9506 [2022-03-19 23:25:13,244 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 380 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:13,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 28 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 23:25:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 23:25:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 61. [2022-03-19 23:25:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.3214285714285714) internal successors, (74), 57 states have internal predecessors, (74), 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 23:25:13,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-03-19 23:25:13,259 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 32 [2022-03-19 23:25:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:13,260 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-03-19 23:25:13,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 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 23:25:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-03-19 23:25:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 23:25:13,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:13,264 INFO L499 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:13,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 23:25:13,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:13,467 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1558436086, now seen corresponding path program 4 times [2022-03-19 23:25:13,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070502776] [2022-03-19 23:25:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:14,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:14,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070502776] [2022-03-19 23:25:14,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070502776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604240174] [2022-03-19 23:25:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 23:25:14,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:14,124 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 23:25:14,126 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 23:25:14,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 23:25:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 23:25:14,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 23:25:14,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 23:25:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:15,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 23:25:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:18,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604240174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 23:25:18,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 23:25:18,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 65 [2022-03-19 23:25:18,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905251504] [2022-03-19 23:25:18,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 23:25:18,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-19 23:25:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 23:25:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-19 23:25:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-03-19 23:25:18,706 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 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 23:25:22,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 23:25:22,389 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2022-03-19 23:25:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-19 23:25:22,389 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 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 41 [2022-03-19 23:25:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 23:25:22,390 INFO L225 Difference]: With dead ends: 142 [2022-03-19 23:25:22,390 INFO L226 Difference]: Without dead ends: 92 [2022-03-19 23:25:22,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 23 SyntacticMatches, 31 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2791 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-03-19 23:25:22,394 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 297 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 23:25:22,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 38 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 23:25:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-19 23:25:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2022-03-19 23:25:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.25) internal successors, (90), 73 states have internal predecessors, (90), 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 23:25:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2022-03-19 23:25:22,410 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 41 [2022-03-19 23:25:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 23:25:22,410 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2022-03-19 23:25:22,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 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 23:25:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2022-03-19 23:25:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 23:25:22,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 23:25:22,411 INFO L499 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 23:25:22,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 23:25:22,627 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,SelfDestructingSolverStorable8 [2022-03-19 23:25:22,628 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 23:25:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 23:25:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1034766295, now seen corresponding path program 5 times [2022-03-19 23:25:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 23:25:22,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834684211] [2022-03-19 23:25:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 23:25:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 23:25:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:23,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 23:25:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 23:25:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 23:25:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 23:25:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834684211] [2022-03-19 23:25:23,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834684211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 23:25:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778186797] [2022-03-19 23:25:23,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 23:25:23,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 23:25:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 23:25:23,984 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 23:25:24,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process